1042 changed files with 90713 additions and 156477 deletions
--- a/.editorconfig
+++ b/.editorconfig
@ -1,6 +1,6 @@
 root = true

-[*.{js,jsm,mjs,json,html,css,pdf.link}]
+[*.{js,jsm,html,css}]
 charset = utf-8
 end_of_line = lf
 indent_size = 2
@ -9,12 +9,9 @@ insert_final_newline = true
 max_line_length = 80
 trim_trailing_whitespace = true

-[*.{json,pdf.link}]
-max_line_length = off
-
 [*.md]
-max_line_length = off
+max_line_length = 0
 trim_trailing_whitespace = false

 [COMMIT_EDITMSG]
-max_line_length = off
+max_line_length = 0
--- a/.eslintignore
+++ b/.eslintignore
@ -3,10 +3,13 @@ l10n/
 docs/
 node_modules/
 external/bcmaps/
+external/webL10n/
 external/builder/fixtures/
 external/builder/fixtures_esprima/
 external/quickjs/
+src/shared/cffStandardStrings.js
+src/shared/fonts_utils.js
 test/tmp/
 test/pdfs/
-web/locale/
+test/resources/
 *~/
--- a/.eslintrc
+++ b/.eslintrc
@ -1,6 +1,6 @@
 {
  "parserOptions": {
-    "ecmaVersion": 2022,
+    "ecmaVersion": 2021,
    "sourceType": "module",
  },

@ -20,29 +20,22 @@

  "env": {
    "browser": true,
-    "es2022": true,
+    "es2021": true,
    "worker": true,
+    "amd": true,
  },

  "globals": {
-    "PDFJSDev": "readonly",
-    "__non_webpack_import__": "readonly",
+    "PDFJSDev": false,
+    "exports": false,
+    "SystemJS": false,
  },

  "rules": {
    // Plugins
-    "import/export": "error",
-    "import/exports-last": "error",
    "import/extensions": ["error", "always", { "ignorePackages": true, }],
-    "import/first": "error",
-    "import/named": "error",
-    "import/no-cycle": "error",
-    "import/no-empty-named-blocks": "error",
-    "import/no-commonjs": "error",
-    "import/no-mutable-exports": "error",
-    "import/no-self-import": "error",
    "import/no-unresolved": ["error", {
-      "ignore": ["display", "pdfjs", "pdfjs-lib", "pdfjs-web", "web", "fluent-bundle", "fluent-dom"],
+      "ignore": ["pdfjs", "pdfjs-lib", "pdfjs-web"]
    }],
    "mozilla/avoid-removeChild": "error",
    "mozilla/use-includes-instead-of-indexOf": "error",
@ -54,31 +47,7 @@
    "unicorn/no-abusive-eslint-disable": "error",
    "unicorn/no-array-push-push": "error",
    "unicorn/no-instanceof-array": "error",
-    "unicorn/no-invalid-remove-event-listener": "error",
-    "unicorn/no-new-buffer": "error",
-    "unicorn/no-typeof-undefined": ["error", {
-      "checkGlobalVariables": false,
-    }],
-    "unicorn/no-useless-promise-resolve-reject": "error",
-    "unicorn/no-useless-spread": "error",
-    "unicorn/prefer-array-find": "error",
-    "unicorn/prefer-array-flat": "error",
-    "unicorn/prefer-array-flat-map": "error",
-    "unicorn/prefer-array-index-of": "error",
-    "unicorn/prefer-array-some": "error",
-    "unicorn/prefer-at": "error",
-    "unicorn/prefer-date-now": "error",
-    "unicorn/prefer-dom-node-append": "error",
-    "unicorn/prefer-dom-node-remove": "error",
-    "unicorn/prefer-logical-operator-over-ternary": "error",
-    "unicorn/prefer-modern-dom-apis": "error",
-    "unicorn/prefer-modern-math-apis": "error",
-    "unicorn/prefer-negative-index": "error",
-    "unicorn/prefer-optional-catch-binding": "error",
-    "unicorn/prefer-regexp-test": "error",
-    "unicorn/prefer-string-replace-all": "error",
    "unicorn/prefer-string-starts-ends-with": "error",
-    "unicorn/prefer-ternary": ["error", "only-single-line"],

    // Possible errors
    "for-direction": "error",
@ -99,7 +68,6 @@
    "no-inner-declarations": ["error", "functions"],
    "no-invalid-regexp": "error",
    "no-irregular-whitespace": "error",
-    "no-loss-of-precision": "error",
    "no-obj-calls": "error",
    "no-promise-executor-return": "error",
    "no-regex-spaces": "error",
@ -111,7 +79,6 @@
    "no-unsafe-finally": "error",
    "no-unsafe-negation": "error",
    "no-unsafe-optional-chaining": ["error", { "disallowArithmeticOperators": true }],
-    "no-unused-private-class-members": "error",
    "use-isnan": ["error", { "enforceForIndexOf": true, }],
    "valid-typeof": ["error", { "requireStringLiterals": true, }],

@ -140,12 +107,10 @@
    "no-implied-eval": "error",
    "no-iterator": "error",
    "no-lone-blocks": "error",
-    "no-lonely-if": "error",
    "no-multi-str": "error",
-    "no-new": "error",
    "no-new-func": "error",
-    "no-new-symbol": "error",
    "no-new-wrappers": "error",
+    "no-new": "error",
    "no-octal-escape": "error",
    "no-octal": "error",
    "no-redeclare": "error",
@ -161,7 +126,6 @@
    "no-useless-escape": "error",
    "no-useless-return": "error",
    "prefer-promise-reject-errors": "error",
-    "prefer-spread": "error",
    "wrap-iife": ["error", "any"],
    "yoda": ["error", "never", {
      "exceptRange": true,
@ -171,6 +135,7 @@
    "strict": ["off", "global"],

    // Variables
+    "no-catch-shadow": "error",
    "no-delete-var": "error",
    "no-label-var": "error",
    "no-shadow": "error",
@ -178,7 +143,7 @@
    "no-undef-init": "error",
    "no-undef": ["error", { "typeof": true, }],
    "no-unused-vars": ["error", {
-      "vars": "all",
+      "vars": "local",
      "args": "none",
    }],
    "no-use-before-define": ["error", {
@ -187,6 +152,9 @@
      "variables": false,
    }],

+    // Node.js and CommonJS
+    "no-buffer-constructor": "error",
+
    // Stylistic Issues
    "lines-between-class-members": ["error", "always"],
    "max-len": ["error", {
@ -208,18 +176,6 @@
        "selector": "CallExpression[callee.name='assert'][arguments.length!=2]",
        "message": "`assert()` must always be invoked with two arguments.",
      },
-      {
-        "selector": "CallExpression[callee.name='isCmd'][arguments.length<2]",
-        "message": "Use `instanceof Cmd` rather than `isCmd()` with one argument.",
-      },
-      {
-        "selector": "CallExpression[callee.name='isDict'][arguments.length<2]",
-        "message": "Use `instanceof Dict` rather than `isDict()` with one argument.",
-      },
-      {
-        "selector": "CallExpression[callee.name='isName'][arguments.length<2]",
-        "message": "Use `instanceof Name` rather than `isName()` with one argument.",
-      },
      {
        "selector": "NewExpression[callee.name='Cmd']",
        "message": "Use `Cmd.get()` rather than `new Cmd()`.",
@ -243,9 +199,9 @@
    }],

    // ECMAScript 6
-    "arrow-body-style": ["error", "as-needed"],
    "constructor-super": "error",
    "no-class-assign": "error",
+    "no-confusing-arrow": "error",
    "no-const-assign": "error",
    "no-dupe-class-members": "error",
    "no-duplicate-imports": "error",
@ -258,7 +214,6 @@
      "avoidQuotes": true,
    }],
    "prefer-const": "error",
-    "require-yield": "error",
    "sort-imports": ["error", {
      "ignoreCase": true,
    }],
--- a/.git-blame-ignore-revs
+++ b/.git-blame-ignore-revs
@ -1,6 +0,0 @@
-# Auto-format `.js` files with ESLint/Prettier
-de36b2aabab2b7fd647d9591f959c4540129541d
-# Auto-format `.css` files with Stylelint/Prettier
-8aa2718d225ad701a5b8a2788b42d221f1e4327d
-# Auto-format `.json` files with Prettier
-29de9bdce6c9785574994fda0e51533d796a9bb4
--- a/.gitattributes
+++ b/.gitattributes
@ -4,7 +4,7 @@
 *.css        text eol=lf
 *.html       text eol=lf
 *.md         text eol=lf
-*.ftl        text eol=lf
+*.properties text eol=lf
 *.yml        text eol=lf
 *.json       text eol=lf
 *.config     text eol=lf
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@ -1 +0,0 @@
-l10n/en-US/*.ftl @mozilla/pdfjs-l10n
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@ -1,8 +0,0 @@
-version: 2
-updates:
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "weekly"
-    labels:
-      - "dependencies"
--- a/.github/fluent_linter_config.yml
+++ b/.github/fluent_linter_config.yml
@ -1,27 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-# See https://github.com/mozilla-l10n/moz-fluent-linter/blob/main/src/fluent_linter/config.yml
-# for details
-
---
-ID01:
-    enabled: true
-    exclusions:
-        messages: []
-        files: []
-ID02:
-    enabled: true
-    min_length: 9
-    exclusions:
-        messages: []
-        files: []
-CO01:
-    enabled: true
-    brands:
-        - Firefox
-        - Mozilla
-    exclusions:
-        files: []
-        messages: []
--- a/.github/requirements.txt
+++ b/.github/requirements.txt
@ -1 +0,0 @@
-moz-fluent-linter==0.4.*
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@ -1,37 +1,14 @@
 name: CI
 on: [push, pull_request]
-permissions:
-  contents: read
-
 jobs:
-  test:
-    name: Test
+  build:
    runs-on: ubuntu-latest
-
-    strategy:
-      fail-fast: false
-      matrix:
-        node-version: [18, lts/*, latest]
-
    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
+      - uses: actions/checkout@v2
+      - name: Use Node.js 14 LTS
+        uses: actions/setup-node@v1
        with:
-          fetch-depth: 0
-
-      - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
-        with:
-          node-version: ${{ matrix.node-version }}
-
-      - name: Install Gulp
-        run: npm install -g gulp-cli
-
-      - name: Install other dependencies
-        run: npm install
-
-      - name: Run external tests
-        run: gulp externaltest
-
-      - name: Run CLI unit tests
-        run: gulp unittestcli
+          node-version: 14.x
+      - run: npm install -g gulp-cli
+      - run: npm install
+      - run: npm test
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@ -1,35 +0,0 @@
-name: CodeQL
-on: [push, pull_request]
-permissions:
-  contents: read
-
-jobs:
-  analyze:
-    name: Analyze
-    runs-on: ubuntu-latest
-
-    permissions:
-      security-events: write
-
-    strategy:
-      fail-fast: false
-      matrix:
-        language: [javascript]
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-
-      - name: Initialize CodeQL
-        uses: github/codeql-action/init@v3
-        with:
-          languages: ${{ matrix.language }}
-          queries: security-and-quality
-
-      - name: Autobuild CodeQL
-        uses: github/codeql-action/autobuild@v3
-
-      - name: Perform CodeQL analysis
-        uses: github/codeql-action/analyze@v3
--- a/.github/workflows/fluent_linter.yml
+++ b/.github/workflows/fluent_linter.yml
@ -1,42 +0,0 @@
-name: Lint Fluent Reference Files
-on:
-  push:
-    paths:
-      - 'l10n/en-US/**.ftl'
-      - '.github/fluent_linter_config.yml'
-      - '.github/workflows/fluent_linter.yml'
-    branches:
-      - master
-  pull_request:
-    paths:
-      - 'l10n/en-US/**.ftl'
-      - '.github/fluent_linter_config.yml'
-      - '.github/workflows/fluent_linter.yml'
-    branches:
-      - master
-  workflow_dispatch:
-permissions:
-  contents: read
-
-jobs:
-  lint:
-    name: Lint
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-
-      - name: Use Python 3.12
-        uses: actions/setup-python@v5
-        with:
-          python-version: '3.12'
-          cache: 'pip'
-
-      - name: Install Fluent dependencies
-        run: |
-          pip install -r .github/requirements.txt
-
-      - name: Lint Fluent reference files
-        run: |
-          moz-fluent-lint ./l10n/en-US --config .github/fluent_linter_config.yml
--- a/.github/workflows/font_tests.yml
+++ b/.github/workflows/font_tests.yml
@ -1,64 +0,0 @@
-name: Font tests
-on:
-  push:
-    paths:
-      - 'gulpfile.mjs'
-      - 'src/**'
-      - 'test/test.mjs'
-      - 'test/font/**'
-      - '.github/workflows/font_tests.yml'
-    branches:
-      - master
-  pull_request:
-    paths:
-      - 'gulpfile.mjs'
-      - 'src/**'
-      - 'test/test.mjs'
-      - 'test/font/**'
-      - '.github/workflows/font_tests.yml'
-    branches:
-      - master
-  workflow_dispatch:
-permissions:
-  contents: read
-
-jobs:
-  test:
-    name: Test
-
-    strategy:
-      fail-fast: false
-      matrix:
-        node-version: [lts/*]
-        os: [windows-latest, ubuntu-latest]
-
-    runs-on: ${{ matrix.os }}
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-
-      - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
-        with:
-          node-version: ${{ matrix.node-version }}
-
-      - name: Install Gulp
-        run: npm install -g gulp-cli
-
-      - name: Install other dependencies
-        run: npm install
-
-      - name: Use Python 3.12
-        uses: actions/setup-python@v5
-        with:
-          python-version: '3.12'
-          cache: 'pip'
-
-      - name: Install Fonttools
-        run: pip install fonttools
-
-      - name: Run font tests
-        run: gulp fonttest --headless
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@ -1,37 +0,0 @@
-name: Lint
-on: [push, pull_request]
-permissions:
-  contents: read
-
-jobs:
-  lint:
-    name: Lint
-    runs-on: ubuntu-latest
-
-    strategy:
-      fail-fast: false
-      matrix:
-        node-version: [lts/*]
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-
-      - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
-        with:
-          node-version: ${{ matrix.node-version }}
-
-      - name: Install Gulp
-        run: npm install -g gulp-cli
-
-      - name: Install other dependencies
-        run: npm install
-
-      - name: Run lint
-        run: gulp lint
-
-      - name: Run lint-chromium
-        run: gulp lint-chromium
--- a/.github/workflows/publish_website.yml
+++ b/.github/workflows/publish_website.yml
@ -1,72 +0,0 @@
-name: Publish website
-on:
-  push:
-    branches:
-      - master
-permissions:
-  contents: read
-
-jobs:
-  build:
-    name: Build
-    runs-on: ubuntu-latest
-
-    strategy:
-      matrix:
-        node-version: [lts/*]
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-
-      - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
-        with:
-          node-version: ${{ matrix.node-version }}
-
-      - name: Install Gulp
-        run: npm install -g gulp-cli
-
-      - name: Install other dependencies
-        run: npm install
-
-      - name: Build the website
-        run: gulp web
-
-      - name: Archive the website
-        shell: sh
-        run: |
-          chmod -c -R +rX "$INPUT_PATH" | while read line; do
-            echo "::warning title=Invalid file permissions automatically fixed::$line"
-          done
-          tar \
-            --dereference --hard-dereference \
-            --directory "$INPUT_PATH" \
-            -cvf "$RUNNER_TEMP/website.tar" \
-            --exclude=.git \
-            --exclude=.github \
-            .
-        env:
-          INPUT_PATH: build/gh-pages
-
-      - name: Upload the website
-        uses: actions/upload-artifact@v4
-        with:
-          name: github-pages
-          path: ${{ runner.temp }}/website.tar
-          retention-days: 1
-          if-no-files-found: error
-
-  deploy:
-    name: Deploy
-    runs-on: ubuntu-latest
-    needs: build
-    permissions:
-      pages: write  # Required to deploy to GitHub Pages.
-      id-token: write  # Required to verify that the deployment originates from this workflow.
-
-    steps:
-      - name: Deploy the website
-        uses: actions/deploy-pages@v4
--- a/.github/workflows/types_tests.yml
+++ b/.github/workflows/types_tests.yml
@ -1,34 +0,0 @@
-name: Types tests
-on: [push, pull_request]
-permissions:
-  contents: read
-
-jobs:
-  test:
-    name: Test
-    runs-on: ubuntu-latest
-
-    strategy:
-      fail-fast: false
-      matrix:
-        node-version: [lts/*]
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-
-      - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
-        with:
-          node-version: ${{ matrix.node-version }}
-
-      - name: Install Gulp
-        run: npm install -g gulp-cli
-
-      - name: Install other dependencies
-        run: npm install
-
-      - name: Run types tests
-        run: gulp typestest
--- a/.gitmodules
+++ b/.gitmodules
@ -0,0 +1,3 @@
+[submodule "test/ttx/fonttools-code"]
+	path = test/ttx/fonttools-code
+	url = https://github.com/behdad/fonttools.git
--- a/.prettierignore
+++ b/.prettierignore
@ -1,12 +0,0 @@
-build/
-l10n/
-docs/
-node_modules/
-external/bcmaps/
-external/builder/fixtures/
-external/builder/fixtures_esprima/
-external/quickjs/
-test/tmp/
-test/pdfs/
-web/locale/
-*~/
--- a/.prettierrc
+++ b/.prettierrc
@ -5,14 +5,5 @@
  "semi": true,
  "tabWidth": 2,
  "trailingComma": "es5",
-  "useTabs": false,
-
-  "overrides": [
-    {
-      files: ["tsconfig.json"],
-      options: {
-        parser: "json",
-      },
-    },
-  ]
+  "useTabs": false
 }
--- a/.stylelintignore
+++ b/.stylelintignore
@ -3,10 +3,15 @@ l10n/
 docs/
 node_modules/
 external/bcmaps/
+external/webL10n/
+external/cmapscompress/
 external/builder/fixtures/
 external/builder/fixtures_esprima/
-external/quickjs/
+src/shared/cffStandardStrings.js
+src/shared/fonts_utils.js
 test/tmp/
+test/features/
 test/pdfs/
-web/locale/
+test/resources/
+test/font/*_spec.js
 *~/
--- a/.stylelintrc
+++ b/.stylelintrc
@ -3,23 +3,16 @@
    "stylelint-prettier"
  ],

-  "rules": {
-    "prettier/prettier": true,
+  "extends": [
+    "stylelint-prettier/recommended"
+  ],

-    "alpha-value-notation": "number",
+
+  "rules": {
    "block-no-empty": true,
-    "color-function-notation": "modern",
-    "color-hex-length": "short",
-    "color-no-invalid-hex": true,
-    "declaration-block-no-duplicate-properties": true,
-    "declaration-block-no-redundant-longhand-properties": true,
-    "declaration-property-value-disallowed-list": {
-      "float": ["inline-start", "inline-end"]
-    },
    "length-zero-no-unit": [true, {
      ignore: ["custom-properties"]
    }],
-    "selector-pseudo-element-colon-notation": "double",
    "shorthand-property-no-redundant-values": true,
  },
 }
--- a/README.md
+++ b/README.md
@ -14,7 +14,7 @@ get involved, visit:
 + [Issue Reporting Guide](https://github.com/mozilla/pdf.js/blob/master/.github/CONTRIBUTING.md)
 + [Code Contribution Guide](https://github.com/mozilla/pdf.js/wiki/Contributing)
 + [Frequently Asked Questions](https://github.com/mozilla/pdf.js/wiki/Frequently-Asked-Questions)
-+ [Good Beginner Bugs](https://github.com/mozilla/pdf.js/issues?direction=desc&labels=good-beginner-bug&page=1&sort=created&state=open)
+ [Good Beginner Bugs](https://github.com/mozilla/pdf.js/issues?direction=desc&labels=5-good-beginner-bug&page=1&sort=created&state=open)
 + [Projects](https://github.com/mozilla/pdf.js/projects)

 Feel free to stop by our [Matrix room](https://chat.mozilla.org/#/room/#pdfjs:mozilla.org) for questions or guidance.
@ -23,8 +23,9 @@ Feel free to stop by our [Matrix room](https://chat.mozilla.org/#/room/#pdfjs:mo

 ### Online demo

-Please note that the "Modern browsers" version assumes native support for the
-latest JavaScript features; please also see [this wiki page](https://github.com/mozilla/pdf.js/wiki/Frequently-Asked-Questions#faq-support).
+Please note that the "Modern browsers" version assumes native support for
+features such as e.g. `async`/`await`, `ReadableStream`, optional chaining, and
+nullish coalescing.

 + Modern browsers: https://mozilla.github.io/pdf.js/web/viewer.html

@ -53,19 +54,14 @@ To get a local copy of the current code, clone it using git:

 Next, install Node.js via the [official package](https://nodejs.org) or via
 [nvm](https://github.com/creationix/nvm). You need to install the gulp package
-globally (see also [gulp's getting started](https://github.com/gulpjs/gulp/tree/master/docs/getting-started)):
+globally (see also [gulp's getting started](https://github.com/gulpjs/gulp/blob/master/docs/getting-started.md#getting-started)):

-    $ npm install -g gulp-cli@^2.3.0
-
-If you prefer to not install `gulp-cli` globally, you have to prefix all the `gulp` commands with `npx` (for example, `npx gulp server` instead of `gulp server`).
+    $ npm install -g gulp-cli

 If everything worked out, install all dependencies for PDF.js:

    $ npm install

-> [!NOTE]
-> On MacOS M1/M2 you may see some `node-gyp`-related errors when running `npm install`. This is because one of our dependencies, `"canvas"`, does not provide pre-built binaries for this platform and instead `npm` will try to build it from source. Please make sure to first install the necessary native dependencies using `brew`: https://github.com/Automattic/node-canvas#compiling.
-
 Finally, you need to start a local web server as some browsers do not allow opening
 PDF files using a `file://` URL. Run:

@ -75,7 +71,7 @@ and then you can open:

 + http://localhost:8888/web/viewer.html

-Please keep in mind that this assumes the latest version of Mozilla Firefox; refer to [Building PDF.js](https://github.com/mozilla/pdf.js/blob/master/README.md#building-pdfjs) for non-development usage of the PDF.js library.
+Please keep in mind that this requires a modern and fully up-to-date browser; refer to [Building PDF.js](https://github.com/mozilla/pdf.js/blob/master/README.md#building-pdfjs) for non-development usage of the PDF.js library.

 It is also possible to view all test PDF files on the right side by opening:

@ -144,3 +140,7 @@ Talk to us on Matrix:
 File an issue:

 + https://github.com/mozilla/pdf.js/issues/new
+
+Follow us on twitter: @pdfjs
+
+ https://twitter.com/pdfjs
--- a/docs/contents/examples/index.md
+++ b/docs/contents/examples/index.md
@ -44,24 +44,14 @@ Each PDF page has its own viewport which defines the size in pixels(72DPI) and i
 ```js
 var scale = 1.5;
 var viewport = page.getViewport({ scale: scale, });
-// Support HiDPI-screens.
-var outputScale = window.devicePixelRatio || 1;

 var canvas = document.getElementById('the-canvas');
 var context = canvas.getContext('2d');
-
-canvas.width = Math.floor(viewport.width * outputScale);
-canvas.height = Math.floor(viewport.height * outputScale);
-canvas.style.width = Math.floor(viewport.width) + "px";
-canvas.style.height =  Math.floor(viewport.height) + "px";
-
-var transform = outputScale !== 1
-  ? [outputScale, 0, 0, outputScale, 0, 0]
-  : null;
+canvas.height = viewport.height;
+canvas.width = viewport.width;

 var renderContext = {
  canvasContext: context,
-  transform: transform,
  viewport: viewport
 };
 page.render(renderContext);
@ -81,19 +71,19 @@ var scaledViewport = page.getViewport({ scale: scale, });
 ### Hello World with document load error handling

 The example demonstrates how promises can be used to handle errors during loading.
-It also demonstrates how to wait until a page is loaded and rendered.
+It also demonstrates how to wait until page loaded and rendered.

-<script async src="//jsfiddle.net/pdfjs/9engc9mw/embed/html,css,result/"></script>
+<script async src="//jsfiddle.net/pdfjs/9engc9mw/embed/js,html,css,result/"></script>

 ### Hello World using base64 encoded PDF

 The PDF.js can accept any decoded base64 data as an array.

-<script async src="//jsfiddle.net/pdfjs/cq0asLqz/embed/html,css,result/"></script>
+<script async src="//jsfiddle.net/pdfjs/cq0asLqz/embed/js,html,css,result/"></script>

 ### Previous/Next example

 The same canvas cannot be used to perform to draw two pages at the same time --
 the example demonstrates how to wait on previous operation to be complete.

-<script async src="//jsfiddle.net/pdfjs/wagvs9Lf/embed/html,css,result/"></script>
+<script async src="//jsfiddle.net/pdfjs/wagvs9Lf/embed/js,html,css,result/"></script>
--- a/docs/contents/getting_started/index.md
+++ b/docs/contents/getting_started/index.md
@ -37,22 +37,26 @@ Before downloading PDF.js please take a moment to understand the different layer

 ## Download

-Please refer to [this wiki page](https://github.com/mozilla/pdf.js/wiki/Frequently-Asked-Questions#faq-support) for information about supported browsers.
-
 <div class="row">
  <div class="col-md-4">
-    <h3>Prebuilt (modern browsers)</h3>
+    <h3>Prebuilt</h3>
    <p>
      Includes the generic build of PDF.js and the viewer.
    </p>
+    <span class="GROUP_CLASS">
      <a type="button" class="btn btn-primary" href="https://github.com/mozilla/pdf.js/releases/download/vSTABLE_VERSION/pdfjs-STABLE_VERSION-dist.zip">Stable (vSTABLE_VERSION)</a>
+      <a type="button" class="btn btn-warning HIDDEN_CLASS" href="https://github.com/mozilla/pdf.js/releases/download/vBETA_VERSION/pdfjs-BETA_VERSION-dist.zip">Beta (vBETA_VERSION)</a>
+    </span>
  </div>
  <div class="col-md-4">
-    <h3>Prebuilt (older browsers)</h3>
+    <h3>Prebuilt (for older browsers)</h3>
    <p>
      Includes the generic build of PDF.js and the viewer.
    </p>
+    <span class="GROUP_CLASS">
      <a type="button" class="btn btn-primary" href="https://github.com/mozilla/pdf.js/releases/download/vSTABLE_VERSION/pdfjs-STABLE_VERSION-legacy-dist.zip">Stable (vSTABLE_VERSION)</a>
+      <a type="button" class="btn btn-warning HIDDEN_CLASS" href="https://github.com/mozilla/pdf.js/releases/download/vBETA_VERSION/pdfjs-BETA_VERSION-legacy-dist.zip">Beta (vBETA_VERSION)</a>
+    </span>
  </div>
  <div class="col-md-4">
    <h3>Source</h3>
@ -108,8 +112,9 @@ Note that we only mention the most relevant files and folders.
 │   ├── display/                           - display layer
 │   ├── shared/                            - shared code between the core and display layers
 │   ├── interfaces.js                      - interface definitions for the core/display layers
-│   └── pdf.*.js                           - wrapper files for bundling
-├── test/                                  - unit, font, reference, and integration tests
+│   ├── pdf.*.js                           - wrapper files for bundling
+│   └── worker_loader.js                   - used for developer builds to load worker files
+├── test/                                  - unit, font and reference tests
 ├── web/                                   - viewer layer
 ├── LICENSE
 ├── README.md
--- a/examples/browserify/.gitignore
+++ b/examples/browserify/.gitignore
@ -0,0 +1 @@
+node_modules/
--- a/examples/browserify/README.md
+++ b/examples/browserify/README.md
@ -0,0 +1,26 @@
+## Overview
+
+Example to demonstrate PDF.js library usage with Browserify.
+
+## Getting started
+
+Build project and install the example dependencies:
+
+    $ gulp dist-install
+    $ cd examples/browserify
+    $ npm install
+
+To build Browserify bundles, run `gulp build`. If you are running
+a web server, you can observe the build results at
+http://localhost:8888/examples/browserify/index.html
+
+See main.js, worker.js and gulpfile.js files. Please notice that PDF.js
+packaging requires packaging of the main application and PDF.js worker code,
+and the `workerSrc` path shall be set to the latter file. The pdf.worker.js file
+shall be excluded from the main bundle.
+
+Alternatives to the gulp commands (without compression) are:
+
+    $ mkdir -p ../../build/browserify
+    $ node_modules/.bin/browserify main.js -u ./node_modules/pdfjs-dist/build/pdf.worker.js -o ../../build/browserify/main.bundle.js
+    $ node_modules/.bin/browserify worker.js -o ../../build/browserify/pdf.worker.bundle.js
--- a/examples/browserify/gulpfile.js
+++ b/examples/browserify/gulpfile.js
@ -0,0 +1,40 @@
+const gulp = require("gulp");
+const browserify = require("browserify");
+const streamify = require("gulp-streamify");
+const rename = require("gulp-rename");
+const uglify = require("gulp-uglify");
+const source = require("vinyl-source-stream");
+
+const OUTPUT_PATH = "../../build/browserify";
+const TMP_FILE_PREFIX = "../../build/browserify_";
+
+gulp.task("build-bundle", function () {
+  return browserify("main.js", { output: TMP_FILE_PREFIX + "main.tmp" })
+    .ignore(require.resolve("pdfjs-dist/build/pdf.worker")) // Reducing size
+    .bundle()
+    .pipe(source(TMP_FILE_PREFIX + "main.tmp"))
+    .pipe(streamify(uglify()))
+    .pipe(rename("main.bundle.js"))
+    .pipe(gulp.dest(OUTPUT_PATH));
+});
+
+gulp.task("build-worker", function () {
+  // We can create our own viewer (see worker.js) or use already defined one.
+  const workerSrc = require.resolve("pdfjs-dist/build/pdf.worker.entry");
+  return browserify(workerSrc, { output: TMP_FILE_PREFIX + "worker.tmp" })
+    .bundle()
+    .pipe(source(TMP_FILE_PREFIX + "worker.tmp"))
+    .pipe(
+      streamify(
+        uglify({
+          compress: {
+            sequences: false, // Chrome has issue with the generated code if true
+          },
+        })
+      )
+    )
+    .pipe(rename("pdf.worker.bundle.js"))
+    .pipe(gulp.dest(OUTPUT_PATH));
+});
+
+gulp.task("build", gulp.series("build-bundle", "build-worker"));
--- a/examples/browserify/index.html
+++ b/examples/browserify/index.html
@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>browserify example</title>
+  <script src="../../build/browserify/main.bundle.js"></script>
+</head>
+<body>
+  <canvas id="theCanvas"></canvas>
+</body>
+</html>
--- a/examples/browserify/main.js
+++ b/examples/browserify/main.js
@ -0,0 +1,35 @@
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+// Hello world example for browserify.
+
+const pdfjsLib = require("pdfjs-dist");
+
+const pdfPath = "../learning/helloworld.pdf";
+
+// Setting worker path to worker bundle.
+pdfjsLib.GlobalWorkerOptions.workerSrc =
+  "../../build/browserify/pdf.worker.bundle.js";
+
+// Loading a document.
+const loadingTask = pdfjsLib.getDocument(pdfPath);
+loadingTask.promise
+  .then(function (pdfDocument) {
+    // Request a first page
+    return pdfDocument.getPage(1).then(function (pdfPage) {
+      // Display page on the existing canvas with 100% scale.
+      const viewport = pdfPage.getViewport({ scale: 1.0 });
+      const canvas = document.getElementById("theCanvas");
+      canvas.width = viewport.width;
+      canvas.height = viewport.height;
+      const ctx = canvas.getContext("2d");
+      const renderTask = pdfPage.render({
+        canvasContext: ctx,
+        viewport,
+      });
+      return renderTask.promise;
+    });
+  })
+  .catch(function (reason) {
+    console.error("Error: " + reason);
+  });
--- a/examples/browserify/package.json
+++ b/examples/browserify/package.json
@ -0,0 +1,16 @@
+{
+  "name": "browserify-pdf.js-example",
+  "version": "0.1.0",
+  "devDependencies": {
+    "browserify": "^13.0.0",
+    "gulp": "^3.9.1",
+    "gulp-rename": "^1.2.2",
+    "gulp-streamify": "^1.0.2",
+    "gulp-uglify": "^1.5.3",
+    "pdfjs-dist": "../../node_modules/pdfjs-dist",
+    "vinyl-source-stream": "^1.1.0"
+  },
+  "scripts": {
+    "build": "gulp build"
+  }
+}
--- a/examples/browserify/worker.js
+++ b/examples/browserify/worker.js
@ -0,0 +1,9 @@
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+// Hello world example for browserify: worker bundle.
+
+(typeof window !== "undefined"
+  ? window
+  : {}
+).pdfjsWorker = require("pdfjs-dist/build/pdf.worker");
--- a/examples/components/pageviewer.html
+++ b/examples/components/pageviewer.html
@ -31,13 +31,13 @@ limitations under the License.

  <link rel="stylesheet" href="../../node_modules/pdfjs-dist/web/pdf_viewer.css">

-  <script src="../../node_modules/pdfjs-dist/build/pdf.mjs" type="module"></script>
-  <script src="../../node_modules/pdfjs-dist/web/pdf_viewer.mjs" type="module"></script>
+  <script src="../../node_modules/pdfjs-dist/build/pdf.js"></script>
+  <script src="../../node_modules/pdfjs-dist/web/pdf_viewer.js"></script>
 </head>

 <body tabindex="1">
  <div id="pageContainer" class="pdfViewer singlePageView"></div>

-  <script src="pageviewer.mjs" type="module"></script>
+  <script src="pageviewer.js"></script>
 </body>
 </html>
--- a/examples/components/pageviewer.mjs
+++ b/examples/components/pageviewer.mjs
@ -13,6 +13,8 @@
 * limitations under the License.
 */

+"use strict";
+
 if (!pdfjsLib.getDocument || !pdfjsViewer.PDFPageView) {
  // eslint-disable-next-line no-alert
  alert("Please build the pdfjs-dist library using\n  `gulp dist-install`");
@ -21,7 +23,7 @@ if (!pdfjsLib.getDocument || !pdfjsViewer.PDFPageView) {
 // The workerSrc property shall be specified.
 //
 pdfjsLib.GlobalWorkerOptions.workerSrc =
-  "../../node_modules/pdfjs-dist/build/pdf.worker.mjs";
+  "../../node_modules/pdfjs-dist/build/pdf.worker.js";

 // Some PDFs need external cmaps.
 //
@ -32,8 +34,6 @@ const DEFAULT_URL = "../../web/compressed.tracemonkey-pldi-09.pdf";
 const PAGE_TO_VIEW = 1;
 const SCALE = 1.0;

-const ENABLE_XFA = true;
-
 const container = document.getElementById("pageContainer");

 const eventBus = new pdfjsViewer.EventBus();
@ -43,21 +43,23 @@ const loadingTask = pdfjsLib.getDocument({
  url: DEFAULT_URL,
  cMapUrl: CMAP_URL,
  cMapPacked: CMAP_PACKED,
-  enableXfa: ENABLE_XFA,
 });
-
-const pdfDocument = await loadingTask.promise;
-// Document loaded, retrieving the page.
-const pdfPage = await pdfDocument.getPage(PAGE_TO_VIEW);
-
-// Creating the page view with default parameters.
-const pdfPageView = new pdfjsViewer.PDFPageView({
+loadingTask.promise.then(function (pdfDocument) {
+  // Document loaded, retrieving the page.
+  return pdfDocument.getPage(PAGE_TO_VIEW).then(function (pdfPage) {
+    // Creating the page view with default parameters.
+    const pdfPageView = new pdfjsViewer.PDFPageView({
      container,
      id: PAGE_TO_VIEW,
      scale: SCALE,
      defaultViewport: pdfPage.getViewport({ scale: SCALE }),
      eventBus,
+      // We can enable text/annotations layers, if needed
+      textLayerFactory: new pdfjsViewer.DefaultTextLayerFactory(),
+      annotationLayerFactory: new pdfjsViewer.DefaultAnnotationLayerFactory(),
+    });
+    // Associates the actual page with the view, and drawing it
+    pdfPageView.setPdfPage(pdfPage);
+    return pdfPageView.draw();
+  });
 });
-// Associate the actual page with the view, and draw it.
-pdfPageView.setPdfPage(pdfPage);
-pdfPageView.draw();
--- a/examples/components/simpleviewer.html
+++ b/examples/components/simpleviewer.html
@ -37,8 +37,8 @@ limitations under the License.

  <link rel="stylesheet" href="../../node_modules/pdfjs-dist/web/pdf_viewer.css">

-  <script src="../../node_modules/pdfjs-dist/build/pdf.mjs" type="module"></script>
-  <script src="../../node_modules/pdfjs-dist/web/pdf_viewer.mjs" type="module"></script>
+  <script src="../../node_modules/pdfjs-dist/build/pdf.js"></script>
+  <script src="../../node_modules/pdfjs-dist/web/pdf_viewer.js"></script>
 </head>

 <body tabindex="1">
@ -46,6 +46,6 @@ limitations under the License.
    <div id="viewer" class="pdfViewer"></div>
  </div>

-  <script src="simpleviewer.mjs" type="module"></script>
+  <script src="simpleviewer.js"></script>
 </body>
 </html>
--- a/examples/components/simpleviewer.mjs
+++ b/examples/components/simpleviewer.mjs
@ -13,6 +13,8 @@
 * limitations under the License.
 */

+"use strict";
+
 if (!pdfjsLib.getDocument || !pdfjsViewer.PDFViewer) {
  // eslint-disable-next-line no-alert
  alert("Please build the pdfjs-dist library using\n  `gulp dist-install`");
@ -21,7 +23,7 @@ if (!pdfjsLib.getDocument || !pdfjsViewer.PDFViewer) {
 // The workerSrc property shall be specified.
 //
 pdfjsLib.GlobalWorkerOptions.workerSrc =
-  "../../node_modules/pdfjs-dist/build/pdf.worker.mjs";
+  "../../node_modules/pdfjs-dist/build/pdf.worker.js";

 // Some PDFs need external cmaps.
 //
@ -30,15 +32,12 @@ const CMAP_PACKED = true;

 const DEFAULT_URL = "../../web/compressed.tracemonkey-pldi-09.pdf";
 // To test the AcroForm and/or scripting functionality, try e.g. this file:
-// "../../test/pdfs/160F-2019.pdf"
+// var DEFAULT_URL = "../../test/pdfs/160F-2019.pdf";

-const ENABLE_XFA = true;
-const SEARCH_FOR = ""; // try "Mozilla";
+const SEARCH_FOR = ""; // try 'Mozilla';

-const SANDBOX_BUNDLE_SRC = new URL(
-  "../../node_modules/pdfjs-dist/build/pdf.sandbox.mjs",
-  window.location
-);
+// For scripting support, note also `enableScripting` below.
+const SANDBOX_BUNDLE_SRC = "../../node_modules/pdfjs-dist/build/pdf.sandbox.js";

 const container = document.getElementById("viewerContainer");

@ -67,6 +66,7 @@ const pdfViewer = new pdfjsViewer.PDFViewer({
  linkService: pdfLinkService,
  findController: pdfFindController,
  scriptingManager: pdfScriptingManager,
+  enableScripting: true,
 });
 pdfLinkService.setViewer(pdfViewer);
 pdfScriptingManager.setViewer(pdfViewer);
@ -77,7 +77,7 @@ eventBus.on("pagesinit", function () {

  // We can try searching for things.
  if (SEARCH_FOR) {
-    eventBus.dispatch("find", { type: "", query: SEARCH_FOR });
+    pdfFindController.executeCommand("find", { query: SEARCH_FOR });
  }
 });

@ -86,12 +86,11 @@ const loadingTask = pdfjsLib.getDocument({
  url: DEFAULT_URL,
  cMapUrl: CMAP_URL,
  cMapPacked: CMAP_PACKED,
-  enableXfa: ENABLE_XFA,
 });
+loadingTask.promise.then(function (pdfDocument) {
+  // Document loaded, specifying document for the viewer and
+  // the (optional) linkService.
+  pdfViewer.setDocument(pdfDocument);

-const pdfDocument = await loadingTask.promise;
-// Document loaded, specifying document for the viewer and
-// the (optional) linkService.
-pdfViewer.setDocument(pdfDocument);
-
-pdfLinkService.setDocument(pdfDocument, null);
+  pdfLinkService.setDocument(pdfDocument, null);
+});
--- a/examples/components/singlepageviewer.html
+++ b/examples/components/singlepageviewer.html
@ -37,8 +37,8 @@ limitations under the License.

  <link rel="stylesheet" href="../../node_modules/pdfjs-dist/web/pdf_viewer.css">

-  <script src="../../node_modules/pdfjs-dist/build/pdf.mjs" type="module"></script>
-  <script src="../../node_modules/pdfjs-dist/web/pdf_viewer.mjs" type="module"></script>
+  <script src="../../node_modules/pdfjs-dist/build/pdf.js"></script>
+  <script src="../../node_modules/pdfjs-dist/web/pdf_viewer.js"></script>
 </head>

 <body tabindex="1">
@ -46,6 +46,6 @@ limitations under the License.
    <div id="viewer" class="pdfViewer"></div>
  </div>

-  <script src="singlepageviewer.mjs" type="module"></script>
+  <script src="singlepageviewer.js"></script>
 </body>
 </html>
--- a/examples/components/singlepageviewer.mjs
+++ b/examples/components/singlepageviewer.mjs
@ -13,6 +13,8 @@
 * limitations under the License.
 */

+"use strict";
+
 if (!pdfjsLib.getDocument || !pdfjsViewer.PDFSinglePageViewer) {
  // eslint-disable-next-line no-alert
  alert("Please build the pdfjs-dist library using\n  `gulp dist-install`");
@ -21,7 +23,7 @@ if (!pdfjsLib.getDocument || !pdfjsViewer.PDFSinglePageViewer) {
 // The workerSrc property shall be specified.
 //
 pdfjsLib.GlobalWorkerOptions.workerSrc =
-  "../../node_modules/pdfjs-dist/build/pdf.worker.mjs";
+  "../../node_modules/pdfjs-dist/build/pdf.worker.js";

 // Some PDFs need external cmaps.
 //
@ -30,15 +32,12 @@ const CMAP_PACKED = true;

 const DEFAULT_URL = "../../web/compressed.tracemonkey-pldi-09.pdf";
 // To test the AcroForm and/or scripting functionality, try e.g. this file:
-// "../../test/pdfs/160F-2019.pdf"
+// var DEFAULT_URL = "../../test/pdfs/160F-2019.pdf";

-const ENABLE_XFA = true;
-const SEARCH_FOR = ""; // try "Mozilla";
+const SEARCH_FOR = ""; // try 'Mozilla';

-const SANDBOX_BUNDLE_SRC = new URL(
-  "../../node_modules/pdfjs-dist/build/pdf.sandbox.mjs",
-  window.location
-);
+// For scripting support, note also `enableScripting` below.
+const SANDBOX_BUNDLE_SRC = "../../node_modules/pdfjs-dist/build/pdf.sandbox.js";

 const container = document.getElementById("viewerContainer");

@ -67,6 +66,7 @@ const pdfSinglePageViewer = new pdfjsViewer.PDFSinglePageViewer({
  linkService: pdfLinkService,
  findController: pdfFindController,
  scriptingManager: pdfScriptingManager,
+  enableScripting: true,
 });
 pdfLinkService.setViewer(pdfSinglePageViewer);
 pdfScriptingManager.setViewer(pdfSinglePageViewer);
@ -77,7 +77,7 @@ eventBus.on("pagesinit", function () {

  // We can try searching for things.
  if (SEARCH_FOR) {
-    eventBus.dispatch("find", { type: "", query: SEARCH_FOR });
+    pdfFindController.executeCommand("find", { query: SEARCH_FOR });
  }
 });

@ -86,12 +86,11 @@ const loadingTask = pdfjsLib.getDocument({
  url: DEFAULT_URL,
  cMapUrl: CMAP_URL,
  cMapPacked: CMAP_PACKED,
-  enableXfa: ENABLE_XFA,
 });
+loadingTask.promise.then(function (pdfDocument) {
+  // Document loaded, specifying document for the viewer and
+  // the (optional) linkService.
+  pdfSinglePageViewer.setDocument(pdfDocument);

-const pdfDocument = await loadingTask.promise;
-// Document loaded, specifying document for the viewer and
-// the (optional) linkService.
-pdfSinglePageViewer.setDocument(pdfDocument);
-
-pdfLinkService.setDocument(pdfDocument, null);
+  pdfLinkService.setDocument(pdfDocument, null);
+});
--- a/examples/image_decoders/jpeg_viewer.html
+++ b/examples/image_decoders/jpeg_viewer.html
@ -29,12 +29,12 @@ limitations under the License.
    }
  </style>

-  <script src="../../node_modules/pdfjs-dist/image_decoders/pdf.image_decoders.mjs" type="module"></script>
+  <script src="../../node_modules/pdfjs-dist/image_decoders/pdf.image_decoders.js"></script>
 </head>

 <body tabindex="1">
  <canvas id="jpegCanvas" width="0" height="0"></canvas>

-  <script src="jpeg_viewer.mjs" type="module"></script>
+  <script src="jpeg_viewer.js"></script>
 </body>
 </html>
--- a/examples/image_decoders/jpeg_viewer.mjs
+++ b/examples/image_decoders/jpeg_viewer.mjs
@ -13,6 +13,8 @@
 * limitations under the License.
 */

+"use strict";
+
 if (!pdfjsImageDecoders.JpegImage) {
  // eslint-disable-next-line no-alert
  alert("Please build the pdfjs-dist library using `gulp dist-install`");
@ -25,11 +27,32 @@ const jpegCtx = jpegCanvas.getContext("2d");

 // Load the image data, and convert it to a Uint8Array.
 //
-const response = await fetch(JPEG_IMAGE);
-if (!response.ok) {
-  throw new Error(response.statusText);
+let nonBinaryRequest = false;
+const request = new XMLHttpRequest();
+request.open("GET", JPEG_IMAGE, false);
+try {
+  request.responseType = "arraybuffer";
+  nonBinaryRequest = request.responseType !== "arraybuffer";
+} catch (e) {
+  nonBinaryRequest = true;
+}
+if (nonBinaryRequest && request.overrideMimeType) {
+  request.overrideMimeType("text/plain; charset=x-user-defined");
+}
+request.send(null);
+
+let typedArrayImage;
+if (nonBinaryRequest) {
+  const str = request.responseText,
+    length = str.length;
+  const bytes = new Uint8Array(length);
+  for (let i = 0; i < length; ++i) {
+    bytes[i] = str.charCodeAt(i) & 0xff;
+  }
+  typedArrayImage = bytes;
+} else {
+  typedArrayImage = new Uint8Array(request.response);
 }
-const typedArrayImage = new Uint8Array(await response.arrayBuffer());

 // Parse the image data using `JpegImage`.
 //
--- a/examples/learning/helloworld.html
+++ b/examples/learning/helloworld.html
@ -10,59 +10,51 @@

 <canvas id="the-canvas" style="border: 1px solid black; direction: ltr;"></canvas>

-<script src="../../node_modules/pdfjs-dist/build/pdf.mjs" type="module"></script>
+<script src="../../node_modules/pdfjs-dist/build/pdf.js"></script>

-<script id="script" type="module">
+<script id="script">
  //
  // If absolute URL from the remote server is provided, configure the CORS
  // header on that server.
  //
-  const url = './helloworld.pdf';
+  var url = './helloworld.pdf';

  //
  // The workerSrc property shall be specified.
  //
  pdfjsLib.GlobalWorkerOptions.workerSrc =
-    '../../node_modules/pdfjs-dist/build/pdf.worker.mjs';
+    '../../node_modules/pdfjs-dist/build/pdf.worker.js';

  //
  // Asynchronous download PDF
  //
-  const loadingTask = pdfjsLib.getDocument(url);
-  const pdf = await loadingTask.promise;
+  var loadingTask = pdfjsLib.getDocument(url);
+  loadingTask.promise.then(function(pdf) {
    //
    // Fetch the first page
    //
-  const page = await pdf.getPage(1);
-  const scale = 1.5;
-  const viewport = page.getViewport({ scale });
-  // Support HiDPI-screens.
-  const outputScale = window.devicePixelRatio || 1;
+    pdf.getPage(1).then(function(page) {
+      var scale = 1.5;
+      var viewport = page.getViewport({ scale: scale, });

      //
      // Prepare canvas using PDF page dimensions
      //
-  const canvas = document.getElementById("the-canvas");
-  const context = canvas.getContext("2d");
-
-  canvas.width = Math.floor(viewport.width * outputScale);
-  canvas.height = Math.floor(viewport.height * outputScale);
-  canvas.style.width = Math.floor(viewport.width) + "px";
-  canvas.style.height = Math.floor(viewport.height) + "px";
-
-  const transform = outputScale !== 1
-    ? [outputScale, 0, 0, outputScale, 0, 0]
-    : null;
+      var canvas = document.getElementById('the-canvas');
+      var context = canvas.getContext('2d');
+      canvas.height = viewport.height;
+      canvas.width = viewport.width;

      //
      // Render PDF page into canvas context
      //
-  const renderContext = {
+      var renderContext = {
        canvasContext: context,
-    transform,
-    viewport,
+        viewport: viewport,
      };
      page.render(renderContext);
+    });
+  });
 </script>

 <hr>
--- a/examples/learning/helloworld64.html
+++ b/examples/learning/helloworld64.html
@ -10,9 +10,9 @@

 <canvas id="the-canvas" style="border: 1px solid black; direction: ltr;"></canvas>

-<script src="../../node_modules/pdfjs-dist/build/pdf.mjs" type="module"></script>
+<script src="../../node_modules/pdfjs-dist/build/pdf.js"></script>

-<script id="script" type="module">
+<script id="script">
  // atob() is used to convert base64 encoded PDF to binary-like data.
  // (See also https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/
  // Base64_encoding_and_decoding.)
@ -35,39 +35,31 @@
  // The workerSrc property shall be specified.
  //
  pdfjsLib.GlobalWorkerOptions.workerSrc =
-    '../../node_modules/pdfjs-dist/build/pdf.worker.mjs';
+    '../../node_modules/pdfjs-dist/build/pdf.worker.js';

  // Opening PDF by passing its binary data as a string. It is still preferable
  // to use Uint8Array, but string or array-like structure will work too.
  var loadingTask = pdfjsLib.getDocument({ data: pdfData, });
-  var pdf = await loadingTask.promise;
+  loadingTask.promise.then(function(pdf) {
    // Fetch the first page.
-  var page = await pdf.getPage(1);
+    pdf.getPage(1).then(function(page) {
      var scale = 1.5;
      var viewport = page.getViewport({ scale: scale, });
-  // Support HiDPI-screens.
-  var outputScale = window.devicePixelRatio || 1;

      // Prepare canvas using PDF page dimensions.
      var canvas = document.getElementById('the-canvas');
      var context = canvas.getContext('2d');
-
-  canvas.width = Math.floor(viewport.width * outputScale);
-  canvas.height = Math.floor(viewport.height * outputScale);
-  canvas.style.width = Math.floor(viewport.width) + "px";
-  canvas.style.height =  Math.floor(viewport.height) + "px";
-
-  var transform = outputScale !== 1
-    ? [outputScale, 0, 0, outputScale, 0, 0]
-    : null;
+      canvas.height = viewport.height;
+      canvas.width = viewport.width;

      // Render PDF page into canvas context.
      var renderContext = {
        canvasContext: context,
-    transform,
-    viewport,
+        viewport: viewport,
      };
      page.render(renderContext);
+    });
+  });
 </script>

 <hr>
--- a/examples/learning/prevnext.html
+++ b/examples/learning/prevnext.html
@ -19,9 +19,9 @@
  <canvas id="the-canvas" style="border: 1px solid black; direction: ltr;"></canvas>
 </div>

-<script src="../../node_modules/pdfjs-dist/build/pdf.mjs" type="module"></script>
+<script src="../../node_modules/pdfjs-dist/build/pdf.js"></script>

-<script id="script" type="module">
+<script id="script">
  //
  // If absolute URL from the remote server is provided, configure the CORS
  // header on that server.
@ -34,7 +34,7 @@
  // shall be specified.
  //
  pdfjsLib.GlobalWorkerOptions.workerSrc =
-    '../../node_modules/pdfjs-dist/build/pdf.worker.mjs';
+    '../../node_modules/pdfjs-dist/build/pdf.worker.js';

  var pdfDoc = null,
      pageNum = 1,
@ -53,22 +53,12 @@
    // Using promise to fetch the page
    pdfDoc.getPage(num).then(function(page) {
      var viewport = page.getViewport({ scale: scale, });
-      // Support HiDPI-screens.
-      var outputScale = window.devicePixelRatio || 1;
-
-      canvas.width = Math.floor(viewport.width * outputScale);
-      canvas.height = Math.floor(viewport.height * outputScale);
-      canvas.style.width = Math.floor(viewport.width) + "px";
-      canvas.style.height =  Math.floor(viewport.height) + "px";
-
-      var transform = outputScale !== 1
-        ? [outputScale, 0, 0, outputScale, 0, 0]
-        : null;
+      canvas.height = viewport.height;
+      canvas.width = viewport.width;

      // Render PDF page into canvas context
      var renderContext = {
        canvasContext: ctx,
-        transform: transform,
        viewport: viewport,
      };
      var renderTask = page.render(renderContext);
@ -90,7 +80,7 @@

  /**
   * If another page rendering in progress, waits until the rendering is
-   * finished. Otherwise, executes rendering immediately.
+   * finised. Otherwise, executes rendering immediately.
   */
  function queueRenderPage(num) {
    if (pageRendering) {
@ -128,11 +118,13 @@
   * Asynchronously downloads PDF.
   */
  var loadingTask = pdfjsLib.getDocument(url);
-  pdfDoc = await loadingTask.promise;
+  loadingTask.promise.then(function(pdfDoc_) {
+    pdfDoc = pdfDoc_;
    document.getElementById('page_count').textContent = pdfDoc.numPages;

    // Initial/first page rendering
    renderPage(pageNum);
+  });
 </script>

 </body>
--- a/examples/mobile-viewer/viewer.css
+++ b/examples/mobile-viewer/viewer.css
@ -26,12 +26,12 @@ html {
 }

 header {
-  background-color: rgb(244 244 244 / 1);
+  background-color: rgba(244, 244, 244, 1);
 }

 header h1 {
-  border-bottom: 1px solid rgb(216 216 216 / 1);
-  color: rgb(133 133 133 / 1);
+  border-bottom: 1px solid rgba(216, 216, 216, 1);
+  color: rgba(133, 133, 133, 1);
  font-size: 23px;
  font-style: italic;
  font-weight: normal;
@ -44,7 +44,7 @@ header h1 {

 body {
  background: url(images/document_bg.png);
-  color: rgb(255 255 255 / 1);
+  color: rgba(255, 255, 255, 1);
  font-family: sans-serif;
  font-size: 10px;
  height: 100%;
@ -71,7 +71,7 @@ footer {
  left: 0;
  right: 0;
  z-index: 1;
-  box-shadow: 0 -0.2rem 0.5rem rgb(50 50 50 / 0.75);
+  box-shadow: 0 -0.2rem 0.5rem rgba(50, 50, 50, 0.75);
 }

 .toolbarButton {
@ -81,7 +81,7 @@ footer {
  border-width: 0;
  background-position: center center;
  background-repeat: no-repeat;
-  background-color: rgb(0 0 0 / 0);
+  background-color: rgba(0, 0, 0, 0);
 }

 .toolbarButton.pageUp {
@ -110,9 +110,9 @@ footer {
  left: 36%;
  text-align: center;
  border: 0;
-  background-color: rgb(0 0 0 / 0);
+  background-color: rgba(0, 0, 0, 0);
  font-size: 1.2rem;
-  color: rgb(255 255 255 / 1);
+  color: rgba(255, 255, 255, 1);
  background-image: url(images/div_line_left.png),
    url(images/div_line_right.png);
  background-repeat: no-repeat;
@ -153,7 +153,10 @@ footer {
  position: absolute;
  overflow: auto;
  width: 100%;
-  inset: 5rem 0 4rem;
+  top: 5rem;
+  bottom: 4rem;
+  left: 0;
+  right: 0;
 }

 canvas {
@ -184,47 +187,41 @@ canvas {
 }

 #loadingBar {
-  /* Define this variable here, and not in :root, to avoid reflowing the
-     entire viewer when updating progress (see issue 15958). */
-  --progressBar-percent: 0%;
-
  position: relative;
  height: 0.6rem;
-  background-color: rgb(51 51 51 / 1);
-  border-bottom: 1px solid rgb(51 51 51 / 1);
+  background-color: rgba(51, 51, 51, 1);
+  border-bottom: 1px solid rgba(51, 51, 51, 1);
+  margin-top: 5rem;
 }

 #loadingBar .progress {
  position: absolute;
  left: 0;
-  width: 100%;
-  transform: scaleX(var(--progressBar-percent));
-  transform-origin: 0 0;
+  width: 0;
  height: 100%;
-  background-color: rgb(221 221 221 / 1);
+  background-color: rgba(221, 221, 221, 1);
  overflow: hidden;
-  transition: transform 200ms;
+  transition: width 200ms;
 }

@keyframes progressIndeterminate {
  0% {
-    transform: translateX(0%);
+    left: 0;
  }
  50% {
-    transform: translateX(100%);
+    left: 100%;
  }
  100% {
-    transform: translateX(100%);
+    left: 100%;
  }
 }

-#loadingBar.indeterminate .progress {
-  transform: none;
-  background-color: rgb(153 153 153 / 1);
+#loadingBar .progress.indeterminate {
+  background-color: rgba(153, 153, 153, 1);
  transition: none;
 }

-#loadingBar.indeterminate .progress .glimmer {
+#loadingBar .indeterminate .glimmer {
  position: absolute;
  top: 0;
  left: 0;
@ -232,11 +229,39 @@ canvas {
  width: 5rem;
  background-image: linear-gradient(
    to right,
-    rgb(153 153 153 / 1) 0%,
-    rgb(255 255 255 / 1) 50%,
-    rgb(153 153 153 / 1) 100%
+    rgba(153, 153, 153, 1) 0%,
+    rgba(255, 255, 255, 1) 50%,
+    rgba(153, 153, 153, 1) 100%
  );
  background-size: 100% 100%;
  background-repeat: no-repeat;
  animation: progressIndeterminate 2s linear infinite;
 }
+
+#errorWrapper {
+  background: none repeat scroll 0 0 rgba(255, 85, 85, 1);
+  color: rgba(255, 255, 255, 1);
+  left: 0;
+  position: absolute;
+  right: 0;
+  top: 3.2rem;
+  z-index: 1000;
+  padding: 0.3rem;
+  font-size: 0.8em;
+}
+
+#errorMessageLeft {
+  float: left;
+}
+
+#errorMessageRight {
+  float: right;
+}
+
+#errorMoreInfo {
+  background-color: rgba(255, 255, 255, 1);
+  color: rgba(0, 0, 0, 1);
+  padding: 0.3rem;
+  margin: 0.3rem;
+  width: 98%;
+}
--- a/examples/mobile-viewer/viewer.html
+++ b/examples/mobile-viewer/viewer.html
@ -24,8 +24,8 @@ limitations under the License.
    <link rel="stylesheet" href="../../node_modules/pdfjs-dist/web/pdf_viewer.css">
    <link rel="stylesheet" type="text/css" href="viewer.css">

-    <script src="../../node_modules/pdfjs-dist/build/pdf.mjs" type="module"></script>
-    <script src="../../node_modules/pdfjs-dist/web/pdf_viewer.mjs" type="module"></script>
+    <script src="../../node_modules/pdfjs-dist/build/pdf.js"></script>
+    <script src="../../node_modules/pdfjs-dist/web/pdf_viewer.js"></script>
  </head>

  <body>
@ -42,6 +42,25 @@ limitations under the License.
      <div class="glimmer"></div>
    </div>

+    <div id="errorWrapper" hidden="true">
+      <div id="errorMessageLeft">
+        <span id="errorMessage"></span>
+        <button id="errorShowMore">
+          More Information
+        </button>
+        <button id="errorShowLess">
+          Less Information
+        </button>
+      </div>
+      <div id="errorMessageRight">
+        <button id="errorClose">
+          Close
+        </button>
+      </div>
+      <div class="clearBoth"></div>
+      <textarea id="errorMoreInfo" hidden="true" readonly="readonly"></textarea>
+    </div>
+
    <footer>
      <button class="toolbarButton pageUp" title="Previous Page" id="previous"></button>
      <button class="toolbarButton pageDown" title="Next Page" id="next"></button>
@ -52,6 +71,6 @@ limitations under the License.
      <button class="toolbarButton zoomIn" title="Zoom In" id="zoomIn"></button>
    </footer>

-     <script src="viewer.mjs" type="module"></script>
+     <script src="viewer.js"></script>
  </body>
 </html>
--- a/examples/mobile-viewer/viewer.mjs
+++ b/examples/mobile-viewer/viewer.mjs
@ -13,19 +13,21 @@
 * limitations under the License.
 */

+"use strict";
+
 if (!pdfjsLib.getDocument || !pdfjsViewer.PDFViewer) {
  // eslint-disable-next-line no-alert
  alert("Please build the pdfjs-dist library using\n `gulp dist-install`");
 }

-const MAX_CANVAS_PIXELS = 0; // CSS-only zooming.
+const USE_ONLY_CSS_ZOOM = true;
 const TEXT_LAYER_MODE = 0; // DISABLE
 const MAX_IMAGE_SIZE = 1024 * 1024;
 const CMAP_URL = "../../node_modules/pdfjs-dist/cmaps/";
 const CMAP_PACKED = true;

 pdfjsLib.GlobalWorkerOptions.workerSrc =
-  "../../node_modules/pdfjs-dist/build/pdf.worker.mjs";
+  "../../node_modules/pdfjs-dist/build/pdf.worker.js";

 const DEFAULT_URL = "../../web/compressed.tracemonkey-pldi-09.pdf";
 const DEFAULT_SCALE_DELTA = 1.1;
@ -80,24 +82,46 @@ const PDFViewerApplication = {
        self.pdfDocument = pdfDocument;
        self.pdfViewer.setDocument(pdfDocument);
        self.pdfLinkService.setDocument(pdfDocument);
-        self.pdfHistory.initialize({
-          fingerprint: pdfDocument.fingerprints[0],
-        });
+        self.pdfHistory.initialize({ fingerprint: pdfDocument.fingerprint });

        self.loadingBar.hide();
        self.setTitleUsingMetadata(pdfDocument);
      },
-      function (reason) {
-        let key = "pdfjs-loading-error";
-        if (reason instanceof pdfjsLib.InvalidPDFException) {
-          key = "pdfjs-invalid-file-error";
-        } else if (reason instanceof pdfjsLib.MissingPDFException) {
-          key = "pdfjs-missing-file-error";
-        } else if (reason instanceof pdfjsLib.UnexpectedResponseException) {
-          key = "pdfjs-unexpected-response-error";
+      function (exception) {
+        const message = exception && exception.message;
+        const l10n = self.l10n;
+        let loadingErrorMessage;
+
+        if (exception instanceof pdfjsLib.InvalidPDFException) {
+          // change error message also for other builds
+          loadingErrorMessage = l10n.get(
+            "invalid_file_error",
+            null,
+            "Invalid or corrupted PDF file."
+          );
+        } else if (exception instanceof pdfjsLib.MissingPDFException) {
+          // special message for missing PDFs
+          loadingErrorMessage = l10n.get(
+            "missing_file_error",
+            null,
+            "Missing PDF file."
+          );
+        } else if (exception instanceof pdfjsLib.UnexpectedResponseException) {
+          loadingErrorMessage = l10n.get(
+            "unexpected_response_error",
+            null,
+            "Unexpected server response."
+          );
+        } else {
+          loadingErrorMessage = l10n.get(
+            "loading_error",
+            null,
+            "An error occurred while loading the PDF."
+          );
        }
-        self.l10n.get(key).then(msg => {
-          self.error(msg, { message: reason?.message });
+
+        loadingErrorMessage.then(function (msg) {
+          self.error(msg, { message });
        });
        self.loadingBar.hide();
      }
@ -110,6 +134,9 @@ const PDFViewerApplication = {
   *                      destruction is completed.
   */
  close() {
+    const errorWrapper = document.getElementById("errorWrapper");
+    errorWrapper.hidden = true;
+
    if (!this.pdfLoadingTask) {
      return Promise.resolve();
    }
@ -132,12 +159,9 @@ const PDFViewerApplication = {
  },

  get loadingBar() {
-    const bar = document.getElementById("loadingBar");
-    return pdfjsLib.shadow(
-      this,
-      "loadingBar",
-      new pdfjsViewer.ProgressBar(bar)
-    );
+    const bar = new pdfjsViewer.ProgressBar("#loadingBar", {});
+
+    return pdfjsLib.shadow(this, "loadingBar", bar);
  },

  setTitleUsingUrl: function pdfViewSetTitleUsingUrl(url) {
@ -145,7 +169,7 @@ const PDFViewerApplication = {
    let title = pdfjsLib.getFilenameFromUrl(url) || url;
    try {
      title = decodeURIComponent(title);
-    } catch {
+    } catch (e) {
      // decodeURIComponent may throw URIError,
      // fall back to using the unprocessed url in that case
    }
@ -163,7 +187,7 @@ const PDFViewerApplication = {
      // Provides some basic debug information
      console.log(
        "PDF " +
-          pdfDocument.fingerprints[0] +
+          pdfDocument.fingerprint +
          " [" +
          info.PDFFormatVersion +
          " " +
@ -202,25 +226,79 @@ const PDFViewerApplication = {
  },

  error: function pdfViewError(message, moreInfo) {
+    const l10n = this.l10n;
    const moreInfoText = [
-      `PDF.js v${pdfjsLib.version || "?"} (build: ${pdfjsLib.build || "?"})`,
+      l10n.get(
+        "error_version_info",
+        { version: pdfjsLib.version || "?", build: pdfjsLib.build || "?" },
+        "PDF.js v{{version}} (build: {{build}})"
+      ),
    ];
-    if (moreInfo) {
-      moreInfoText.push(`Message: ${moreInfo.message}`);

+    if (moreInfo) {
+      moreInfoText.push(
+        l10n.get(
+          "error_message",
+          { message: moreInfo.message },
+          "Message: {{message}}"
+        )
+      );
      if (moreInfo.stack) {
-        moreInfoText.push(`Stack: ${moreInfo.stack}`);
+        moreInfoText.push(
+          l10n.get("error_stack", { stack: moreInfo.stack }, "Stack: {{stack}}")
+        );
      } else {
        if (moreInfo.filename) {
-          moreInfoText.push(`File: ${moreInfo.filename}`);
+          moreInfoText.push(
+            l10n.get(
+              "error_file",
+              { file: moreInfo.filename },
+              "File: {{file}}"
+            )
+          );
        }
        if (moreInfo.lineNumber) {
-          moreInfoText.push(`Line: ${moreInfo.lineNumber}`);
+          moreInfoText.push(
+            l10n.get(
+              "error_line",
+              { line: moreInfo.lineNumber },
+              "Line: {{line}}"
+            )
+          );
        }
      }
    }

-    console.error(`${message}\n\n${moreInfoText.join("\n")}`);
+    const errorWrapper = document.getElementById("errorWrapper");
+    errorWrapper.hidden = false;
+
+    const errorMessage = document.getElementById("errorMessage");
+    errorMessage.textContent = message;
+
+    const closeButton = document.getElementById("errorClose");
+    closeButton.onclick = function () {
+      errorWrapper.hidden = true;
+    };
+
+    const errorMoreInfo = document.getElementById("errorMoreInfo");
+    const moreInfoButton = document.getElementById("errorShowMore");
+    const lessInfoButton = document.getElementById("errorShowLess");
+    moreInfoButton.onclick = function () {
+      errorMoreInfo.hidden = false;
+      moreInfoButton.hidden = true;
+      lessInfoButton.hidden = false;
+      errorMoreInfo.style.height = errorMoreInfo.scrollHeight + "px";
+    };
+    lessInfoButton.onclick = function () {
+      errorMoreInfo.hidden = true;
+      moreInfoButton.hidden = false;
+      lessInfoButton.hidden = true;
+    };
+    moreInfoButton.hidden = false;
+    lessInfoButton.hidden = true;
+    Promise.all(moreInfoText).then(function (parts) {
+      errorMoreInfo.value = parts.join("\n");
+    });
  },

  progress: function pdfViewProgress(level) {
@ -272,7 +350,7 @@ const PDFViewerApplication = {
    });
    this.pdfLinkService = linkService;

-    this.l10n = new pdfjsViewer.GenericL10n();
+    this.l10n = pdfjsViewer.NullL10n;

    const container = document.getElementById("viewerContainer");
    const pdfViewer = new pdfjsViewer.PDFViewer({
@ -280,7 +358,7 @@ const PDFViewerApplication = {
      eventBus,
      linkService,
      l10n: this.l10n,
-      maxCanvasPixels: MAX_CANVAS_PIXELS,
+      useOnlyCssZoom: USE_ONLY_CSS_ZOOM,
      textLayerMode: TEXT_LAYER_MODE,
    });
    this.pdfViewer = pdfViewer;
--- a/examples/node/domstubs.js
+++ b/examples/node/domstubs.js
@ -0,0 +1,276 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function xmlEncode(s) {
+  let i = 0,
+    ch;
+  s = String(s);
+  while (
+    i < s.length &&
+    (ch = s[i]) !== "&" &&
+    ch !== "<" &&
+    ch !== '"' &&
+    ch !== "\n" &&
+    ch !== "\r" &&
+    ch !== "\t"
+  ) {
+    i++;
+  }
+  if (i >= s.length) {
+    return s;
+  }
+  let buf = s.substring(0, i);
+  while (i < s.length) {
+    ch = s[i++];
+    switch (ch) {
+      case "&":
+        buf += "&amp;";
+        break;
+      case "<":
+        buf += "&lt;";
+        break;
+      case '"':
+        buf += "&quot;";
+        break;
+      case "\n":
+        buf += "&#xA;";
+        break;
+      case "\r":
+        buf += "&#xD;";
+        break;
+      case "\t":
+        buf += "&#x9;";
+        break;
+      default:
+        buf += ch;
+        break;
+    }
+  }
+  return buf;
+}
+
+function DOMElement(name) {
+  this.nodeName = name;
+  this.childNodes = [];
+  this.attributes = {};
+  this.textContent = "";
+
+  if (name === "style") {
+    this.sheet = {
+      cssRules: [],
+      insertRule(rule) {
+        this.cssRules.push(rule);
+      },
+    };
+  }
+}
+
+DOMElement.prototype = {
+  getAttribute: function DOMElement_getAttribute(name) {
+    if (name in this.attributes) {
+      return this.attributes[name];
+    }
+    return null;
+  },
+
+  getAttributeNS: function DOMElement_getAttributeNS(NS, name) {
+    // Fast path
+    if (name in this.attributes) {
+      return this.attributes[name];
+    }
+    // Slow path - used by test/unit/display_svg_spec.js
+    // Assuming that there is only one matching attribute for a given name,
+    // across all namespaces.
+    if (NS) {
+      const suffix = ":" + name;
+      for (const fullName in this.attributes) {
+        if (fullName.slice(-suffix.length) === suffix) {
+          return this.attributes[fullName];
+        }
+      }
+    }
+    return null;
+  },
+
+  setAttribute: function DOMElement_setAttribute(name, value) {
+    this.attributes[name] = value || "";
+  },
+
+  setAttributeNS: function DOMElement_setAttributeNS(NS, name, value) {
+    this.setAttribute(name, value);
+  },
+
+  appendChild: function DOMElement_appendChild(element) {
+    const childNodes = this.childNodes;
+    if (!childNodes.includes(element)) {
+      childNodes.push(element);
+    }
+  },
+
+  hasChildNodes: function DOMElement_hasChildNodes() {
+    return this.childNodes.length !== 0;
+  },
+
+  cloneNode: function DOMElement_cloneNode() {
+    const newNode = new DOMElement(this.nodeName);
+    newNode.childNodes = this.childNodes;
+    newNode.attributes = this.attributes;
+    newNode.textContent = this.textContent;
+    return newNode;
+  },
+
+  // This method is offered for convenience. It is recommended to directly use
+  // getSerializer because that allows you to process the chunks as they come
+  // instead of requiring the whole image to fit in memory.
+  toString: function DOMElement_toString() {
+    const buf = [];
+    const serializer = this.getSerializer();
+    let chunk;
+    while ((chunk = serializer.getNext()) !== null) {
+      buf.push(chunk);
+    }
+    return buf.join("");
+  },
+
+  getSerializer: function DOMElement_getSerializer() {
+    return new DOMElementSerializer(this);
+  },
+};
+
+function DOMElementSerializer(node) {
+  this._node = node;
+  this._state = 0;
+  this._loopIndex = 0;
+  this._attributeKeys = null;
+  this._childSerializer = null;
+}
+DOMElementSerializer.prototype = {
+  /**
+   * Yields the next chunk in the serialization of the element.
+   *
+   * @returns {string|null} null if the element has fully been serialized.
+   */
+  getNext: function DOMElementSerializer_getNext() {
+    const node = this._node;
+    switch (this._state) {
+      case 0: // Start opening tag.
+        ++this._state;
+        return "<" + node.nodeName;
+      case 1: // Add SVG namespace if this is the root element.
+        ++this._state;
+        if (node.nodeName === "svg:svg") {
+          return (
+            ' xmlns:xlink="http://www.w3.org/1999/xlink"' +
+            ' xmlns:svg="http://www.w3.org/2000/svg"'
+          );
+        }
+      /* falls through */
+      case 2: // Initialize variables for looping over attributes.
+        ++this._state;
+        this._loopIndex = 0;
+        this._attributeKeys = Object.keys(node.attributes);
+      /* falls through */
+      case 3: // Serialize any attributes and end opening tag.
+        if (this._loopIndex < this._attributeKeys.length) {
+          const name = this._attributeKeys[this._loopIndex++];
+          return " " + name + '="' + xmlEncode(node.attributes[name]) + '"';
+        }
+        ++this._state;
+        return ">";
+      case 4: // Serialize textContent for tspan/style elements.
+        if (node.nodeName === "svg:tspan" || node.nodeName === "svg:style") {
+          this._state = 6;
+          return xmlEncode(node.textContent);
+        }
+        ++this._state;
+        this._loopIndex = 0;
+      /* falls through */
+      case 5: // Serialize child nodes (only for non-tspan/style elements).
+        while (true) {
+          const value =
+            this._childSerializer && this._childSerializer.getNext();
+          if (value !== null) {
+            return value;
+          }
+          const nextChild = node.childNodes[this._loopIndex++];
+          if (nextChild) {
+            this._childSerializer = new DOMElementSerializer(nextChild);
+          } else {
+            this._childSerializer = null;
+            ++this._state;
+            break;
+          }
+        }
+      /* falls through */
+      case 6: // Ending tag.
+        ++this._state;
+        return "</" + node.nodeName + ">";
+      case 7: // Done.
+        return null;
+      default:
+        throw new Error("Unexpected serialization state: " + this._state);
+    }
+  },
+};
+
+const document = {
+  childNodes: [],
+
+  get currentScript() {
+    return { src: "" };
+  },
+
+  get documentElement() {
+    return this;
+  },
+
+  createElementNS(NS, element) {
+    const elObject = new DOMElement(element);
+    return elObject;
+  },
+
+  createElement(element) {
+    return this.createElementNS("", element);
+  },
+
+  getElementsByTagName(element) {
+    if (element === "head") {
+      return [this.head || (this.head = new DOMElement("head"))];
+    }
+    return [];
+  },
+};
+
+function Image() {
+  this._src = null;
+  this.onload = null;
+}
+Image.prototype = {
+  get src() {
+    return this._src;
+  },
+  set src(value) {
+    this._src = value;
+    if (this.onload) {
+      this.onload();
+    }
+  },
+};
+
+exports.document = document;
+exports.Image = Image;
+
+const exported_symbols = Object.keys(exports);
+
+exports.setStubs = function (namespace) {
+  exported_symbols.forEach(function (key) {
+    console.assert(!(key in namespace), "property should not be set: " + key);
+    namespace[key] = exports[key];
+  });
+};
+exports.unsetStubs = function (namespace) {
+  exported_symbols.forEach(function (key) {
+    console.assert(key in namespace, "property should be set: " + key);
+    delete namespace[key];
+  });
+};
--- a/examples/node/getinfo.mjs
+++ b/examples/node/getinfo.mjs
@ -3,10 +3,12 @@

 //
 // Basic node example that prints document metadata and text content.
+// Requires single file built version of PDF.js -- please run
+// `gulp singlefile` before running the example.
 //

 // Run `gulp dist-install` to generate 'pdfjs-dist' npm package files.
-import { getDocument } from "pdfjs-dist/legacy/build/pdf.mjs";
+const pdfjsLib = require("pdfjs-dist/legacy/build/pdf.js");

 // Loading file from file system into typed array
 const pdfPath =
@ -14,7 +16,7 @@ const pdfPath =

 // Will be using promises to load document, pages and misc data instead of
 // callback.
-const loadingTask = getDocument(pdfPath);
+const loadingTask = pdfjsLib.getDocument(pdfPath);
 loadingTask.promise
  .then(function (doc) {
    const numPages = doc.numPages;
@ -51,8 +53,6 @@ loadingTask.promise
            });
            console.log("## Text Content");
            console.log(strings.join(" "));
-            // Release page resources.
-            page.cleanup();
          })
          .then(function () {
            console.log();
--- a/examples/node/pdf2png/pdf2png.mjs
+++ b/examples/node/pdf2png/pdf2png.mjs
@ -13,13 +13,13 @@
 * limitations under the License.
 */

-import { strict as assert } from "assert";
-import Canvas from "canvas";
-import fs from "fs";
-import { getDocument } from "pdfjs-dist/legacy/build/pdf.mjs";
+const Canvas = require("canvas");
+const assert = require("assert").strict;
+const fs = require("fs");

-class NodeCanvasFactory {
-  create(width, height) {
+function NodeCanvasFactory() {}
+NodeCanvasFactory.prototype = {
+  create: function NodeCanvasFactory_create(width, height) {
    assert(width > 0 && height > 0, "Invalid canvas size");
    const canvas = Canvas.createCanvas(width, height);
    const context = canvas.getContext("2d");
@ -27,16 +27,16 @@ class NodeCanvasFactory {
      canvas,
      context,
    };
-  }
+  },

-  reset(canvasAndContext, width, height) {
+  reset: function NodeCanvasFactory_reset(canvasAndContext, width, height) {
    assert(canvasAndContext.canvas, "Canvas is not specified");
    assert(width > 0 && height > 0, "Invalid canvas size");
    canvasAndContext.canvas.width = width;
    canvasAndContext.canvas.height = height;
-  }
+  },

-  destroy(canvasAndContext) {
+  destroy: function NodeCanvasFactory_destroy(canvasAndContext) {
    assert(canvasAndContext.canvas, "Canvas is not specified");

    // Zeroing the width and height cause Firefox to release graphics
@ -45,8 +45,10 @@ class NodeCanvasFactory {
    canvasAndContext.canvas.height = 0;
    canvasAndContext.canvas = null;
    canvasAndContext.context = null;
-  }
-}
+  },
+};
+
+const pdfjsLib = require("pdfjs-dist/legacy/build/pdf.js");

 // Some PDFs need external cmaps.
 const CMAP_URL = "../../../node_modules/pdfjs-dist/cmaps/";
@ -56,29 +58,27 @@ const CMAP_PACKED = true;
 const STANDARD_FONT_DATA_URL =
  "../../../node_modules/pdfjs-dist/standard_fonts/";

-const canvasFactory = new NodeCanvasFactory();
-
 // Loading file from file system into typed array.
 const pdfPath =
  process.argv[2] || "../../../web/compressed.tracemonkey-pldi-09.pdf";
 const data = new Uint8Array(fs.readFileSync(pdfPath));

 // Load the PDF file.
-const loadingTask = getDocument({
+const loadingTask = pdfjsLib.getDocument({
  data,
  cMapUrl: CMAP_URL,
  cMapPacked: CMAP_PACKED,
  standardFontDataUrl: STANDARD_FONT_DATA_URL,
-  canvasFactory,
 });
-
-try {
-  const pdfDocument = await loadingTask.promise;
+loadingTask.promise
+  .then(function (pdfDocument) {
    console.log("# PDF document loaded.");
+
    // Get the first page.
-  const page = await pdfDocument.getPage(1);
+    pdfDocument.getPage(1).then(function (page) {
      // Render the page on a Node canvas with 100% scale.
      const viewport = page.getViewport({ scale: 1.0 });
+      const canvasFactory = new NodeCanvasFactory();
      const canvasAndContext = canvasFactory.create(
        viewport.width,
        viewport.height
@ -86,21 +86,25 @@ try {
      const renderContext = {
        canvasContext: canvasAndContext.context,
        viewport,
+        canvasFactory,
      };

      const renderTask = page.render(renderContext);
-  await renderTask.promise;
+      renderTask.promise.then(function () {
        // Convert the canvas to an image buffer.
        const image = canvasAndContext.canvas.toBuffer();
        fs.writeFile("output.png", image, function (error) {
          if (error) {
            console.error("Error: " + error);
          } else {
-      console.log("Finished converting first page of PDF file to a PNG image.");
+            console.log(
+              "Finished converting first page of PDF file to a PNG image."
+            );
          }
        });
-  // Release page resources.
-  page.cleanup();
-} catch (reason) {
+      });
+    });
+  })
+  .catch(function (reason) {
    console.log(reason);
-}
+  });
--- a/examples/node/pdf2svg.js
+++ b/examples/node/pdf2svg.js
@ -0,0 +1,142 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+//
+// Node tool to dump SVG output into a file.
+//
+
+const fs = require("fs");
+const util = require("util");
+const path = require("path");
+const stream = require("stream");
+
+// HACK few hacks to let PDF.js be loaded not as a module in global space.
+require("./domstubs.js").setStubs(global);
+
+// Run `gulp dist-install` to generate 'pdfjs-dist' npm package files.
+const pdfjsLib = require("pdfjs-dist/legacy/build/pdf.js");
+
+// Some PDFs need external cmaps.
+const CMAP_URL = "../../node_modules/pdfjs-dist/cmaps/";
+const CMAP_PACKED = true;
+
+// Loading file from file system into typed array
+const pdfPath =
+  process.argv[2] || "../../web/compressed.tracemonkey-pldi-09.pdf";
+const data = new Uint8Array(fs.readFileSync(pdfPath));
+
+const outputDirectory = "./svgdump";
+
+try {
+  // Note: This creates a directory only one level deep. If you want to create
+  // multiple subdirectories on the fly, use the mkdirp module from npm.
+  fs.mkdirSync(outputDirectory);
+} catch (e) {
+  if (e.code !== "EEXIST") {
+    throw e;
+  }
+}
+
+// Dumps svg outputs to a folder called svgdump
+function getFilePathForPage(pageNum) {
+  const name = path.basename(pdfPath, path.extname(pdfPath));
+  return path.join(outputDirectory, name + "-" + pageNum + ".svg");
+}
+
+/**
+ * A readable stream which offers a stream representing the serialization of a
+ * given DOM element (as defined by domstubs.js).
+ *
+ * @param {object} options
+ * @param {DOMElement} options.svgElement The element to serialize
+ */
+function ReadableSVGStream(options) {
+  if (!(this instanceof ReadableSVGStream)) {
+    return new ReadableSVGStream(options);
+  }
+  stream.Readable.call(this, options);
+  this.serializer = options.svgElement.getSerializer();
+}
+util.inherits(ReadableSVGStream, stream.Readable);
+// Implements https://nodejs.org/api/stream.html#stream_readable_read_size_1
+ReadableSVGStream.prototype._read = function () {
+  let chunk;
+  while ((chunk = this.serializer.getNext()) !== null) {
+    if (!this.push(chunk)) {
+      return;
+    }
+  }
+  this.push(null);
+};
+
+// Streams the SVG element to the given file path.
+function writeSvgToFile(svgElement, filePath) {
+  let readableSvgStream = new ReadableSVGStream({
+    svgElement,
+  });
+  const writableStream = fs.createWriteStream(filePath);
+  return new Promise(function (resolve, reject) {
+    readableSvgStream.once("error", reject);
+    writableStream.once("error", reject);
+    writableStream.once("finish", resolve);
+    readableSvgStream.pipe(writableStream);
+  }).catch(function (err) {
+    readableSvgStream = null; // Explicitly null because of v8 bug 6512.
+    writableStream.end();
+    throw err;
+  });
+}
+
+// Will be using promises to load document, pages and misc data instead of
+// callback.
+const loadingTask = pdfjsLib.getDocument({
+  data,
+  cMapUrl: CMAP_URL,
+  cMapPacked: CMAP_PACKED,
+  fontExtraProperties: true,
+});
+loadingTask.promise
+  .then(function (doc) {
+    const numPages = doc.numPages;
+    console.log("# Document Loaded");
+    console.log("Number of Pages: " + numPages);
+    console.log();
+
+    let lastPromise = Promise.resolve(); // will be used to chain promises
+    const loadPage = function (pageNum) {
+      return doc.getPage(pageNum).then(function (page) {
+        console.log("# Page " + pageNum);
+        const viewport = page.getViewport({ scale: 1.0 });
+        console.log("Size: " + viewport.width + "x" + viewport.height);
+        console.log();
+
+        return page.getOperatorList().then(function (opList) {
+          const svgGfx = new pdfjsLib.SVGGraphics(page.commonObjs, page.objs);
+          svgGfx.embedFonts = true;
+          return svgGfx.getSVG(opList, viewport).then(function (svg) {
+            return writeSvgToFile(svg, getFilePathForPage(pageNum)).then(
+              function () {
+                console.log("Page: " + pageNum);
+              },
+              function (err) {
+                console.log("Error: " + err);
+              }
+            );
+          });
+        });
+      });
+    };
+
+    for (let i = 1; i <= numPages; i++) {
+      lastPromise = lastPromise.then(loadPage.bind(null, i));
+    }
+    return lastPromise;
+  })
+  .then(
+    function () {
+      console.log("# End of Document");
+    },
+    function (err) {
+      console.error("Error: " + err);
+    }
+  );
--- a/examples/svgviewer/README.md
+++ b/examples/svgviewer/README.md
@ -0,0 +1,8 @@
+## PDF.js using SVG
+
+This is a project for implementing alternate backend for PDF.js using Scalable Vector Graphics. This is still a WIP.
+Take a look at [proposal](https://docs.google.com/document/d/1k4nPx1RrHbxXi94kSdvW5ay8KMkjwLmBEiCNupyzlwk/pub) for this project.
+
+## Getting started
+
+Take a look at src/display/svg.js to see the SVG rendering code.
--- a/examples/svgviewer/index.html
+++ b/examples/svgviewer/index.html
@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<!--
+Copyright 2014 Mozilla Foundation
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+<html dir="ltr" mozdisallowselectionprint>
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
+  <meta name="google" content="notranslate">
+  <title>PDF.js SVG viewer using built components</title>
+
+  <style>
+    body {
+      background-color: #808080;
+      margin: 0;
+      padding: 0;
+    }
+    #viewerContainer {
+      overflow: auto;
+      position: absolute;
+      width: 100%;
+      height: 100%;
+    }
+  </style>
+
+  <link rel="stylesheet" href="../../node_modules/pdfjs-dist/web/pdf_viewer.css">
+
+  <script src="../../node_modules/pdfjs-dist/build/pdf.js"></script>
+  <script src="../../node_modules/pdfjs-dist/web/pdf_viewer.js"></script>
+</head>
+
+<body tabindex="1">
+  <div id="viewerContainer">
+    <div id="viewer" class="pdfViewer"></div>
+  </div>
+
+  <script src="viewer.js"></script>
+</body>
+</html>
--- a/examples/svgviewer/viewer.js
+++ b/examples/svgviewer/viewer.js
@ -0,0 +1,70 @@
+/* Copyright 2014 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+"use strict";
+
+if (!pdfjsLib.getDocument || !pdfjsViewer.PDFViewer) {
+  // eslint-disable-next-line no-alert
+  alert("Please build the pdfjs-dist library using\n  `gulp dist-install`");
+}
+
+// The workerSrc property shall be specified.
+//
+pdfjsLib.GlobalWorkerOptions.workerSrc =
+  "../../node_modules/pdfjs-dist/build/pdf.worker.js";
+
+// Some PDFs need external cmaps.
+//
+const CMAP_URL = "../../node_modules/pdfjs-dist/cmaps/";
+const CMAP_PACKED = true;
+
+const DEFAULT_URL = "../../web/compressed.tracemonkey-pldi-09.pdf";
+
+const container = document.getElementById("viewerContainer");
+
+const eventBus = new pdfjsViewer.EventBus();
+
+// (Optionally) enable hyperlinks within PDF files.
+const pdfLinkService = new pdfjsViewer.PDFLinkService({
+  eventBus,
+});
+
+const pdfViewer = new pdfjsViewer.PDFViewer({
+  container,
+  eventBus,
+  linkService: pdfLinkService,
+  renderer: "svg",
+  textLayerMode: 0,
+});
+pdfLinkService.setViewer(pdfViewer);
+
+eventBus.on("pagesinit", function () {
+  // We can use pdfViewer now, e.g. let's change default scale.
+  pdfViewer.currentScaleValue = "page-width";
+});
+
+// Loading document.
+const loadingTask = pdfjsLib.getDocument({
+  url: DEFAULT_URL,
+  cMapUrl: CMAP_URL,
+  cMapPacked: CMAP_PACKED,
+});
+loadingTask.promise.then(function (pdfDocument) {
+  // Document loaded, specifying document for the viewer and
+  // the (optional) linkService.
+  pdfViewer.setDocument(pdfDocument);
+
+  pdfLinkService.setDocument(pdfDocument, null);
+});
--- a/examples/text-only/index.html
+++ b/examples/text-only/index.html
@ -3,8 +3,8 @@
 <head>
    <meta charset="UTF-8">
    <title>Text-only PDF.js example</title>
-    <script src="../../node_modules/pdfjs-dist/build/pdf.mjs" type="module"></script>
-    <script src="pdf2svg.mjs" type="module"></script>
+    <script src="../../node_modules/pdfjs-dist/build/pdf.js"></script>
+    <script src="pdf2svg.js"></script>
 </head>
 <body>
  <p>Text-only PDF.js example</p>
--- a/examples/text-only/pdf2svg.mjs
+++ b/examples/text-only/pdf2svg.mjs
@ -19,7 +19,7 @@ const PAGE_SCALE = 1.5;
 const SVG_NS = "http://www.w3.org/2000/svg";

 pdfjsLib.GlobalWorkerOptions.workerSrc =
-  "../../node_modules/pdfjs-dist/build/pdf.worker.mjs";
+  "../../node_modules/pdfjs-dist/build/pdf.worker.js";

 function buildSVG(viewport, textContent) {
  // Building SVG with size of the viewport (for simplicity)
@ -43,23 +43,24 @@ function buildSVG(viewport, textContent) {
    text.setAttribute("transform", "matrix(" + tx.join(" ") + ")");
    text.setAttribute("font-family", style.fontFamily);
    text.textContent = textItem.str;
-    svg.append(text);
+    svg.appendChild(text);
  });
  return svg;
 }

-async function pageLoaded() {
+function pageLoaded() {
  // Loading document and page text content
  const loadingTask = pdfjsLib.getDocument({ url: PDF_PATH });
-  const pdfDocument = await loadingTask.promise;
-  const page = await pdfDocument.getPage(PAGE_NUMBER);
+  loadingTask.promise.then(function (pdfDocument) {
+    pdfDocument.getPage(PAGE_NUMBER).then(function (page) {
      const viewport = page.getViewport({ scale: PAGE_SCALE });
-  const textContent = await page.getTextContent();
+      page.getTextContent().then(function (textContent) {
        // building SVG and adding that to the DOM
        const svg = buildSVG(viewport, textContent);
-  document.getElementById("pageContainer").append(svg);
-  // Release page resources.
-  page.cleanup();
+        document.getElementById("pageContainer").appendChild(svg);
+      });
+    });
+  });
 }

 document.addEventListener("DOMContentLoaded", function () {
--- a/examples/webpack/README.md
+++ b/examples/webpack/README.md
@ -27,7 +27,12 @@ otherwise the build is not guaranteed to work correctly.
 ## Worker loading

 If you are getting the `Setting up fake worker` warning, make sure you are
-importing `pdfjs-dist/webpack.mjs` which is the zero-configuration method for
-Webpack users. Installing `worker-loader` is no longer necessary.
+importing `pdfjs-dist/webpack` which is the zero-configuration method for
+Webpack users. You will need to install
+[worker-loader](https://github.com/webpack-contrib/worker-loader) (version 3.0.0 or higher is required), as a
+dependency in your project in order to use `pdfjs-dist/webpack` (configuring
+`worker-loader` is not necessary; just installing it is sufficient).

-    import * as pdfjsLib from 'pdfjs-dist/webpack.mjs';
+    import * as pdfjsLib from 'pdfjs-dist/webpack';
+
+For a full working example refer to [this repository](https://github.com/yurydelendik/pdfjs-react).
--- a/examples/webpack/main.js
+++ b/examples/webpack/main.js
@ -0,0 +1,35 @@
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+// Hello world example for webpack.
+
+const pdfjsLib = require("pdfjs-dist");
+
+const pdfPath = "../learning/helloworld.pdf";
+
+// Setting worker path to worker bundle.
+pdfjsLib.GlobalWorkerOptions.workerSrc =
+  "../../build/webpack/pdf.worker.bundle.js";
+
+// Loading a document.
+const loadingTask = pdfjsLib.getDocument(pdfPath);
+loadingTask.promise
+  .then(function (pdfDocument) {
+    // Request a first page
+    return pdfDocument.getPage(1).then(function (pdfPage) {
+      // Display page on the existing canvas with 100% scale.
+      const viewport = pdfPage.getViewport({ scale: 1.0 });
+      const canvas = document.getElementById("theCanvas");
+      canvas.width = viewport.width;
+      canvas.height = viewport.height;
+      const ctx = canvas.getContext("2d");
+      const renderTask = pdfPage.render({
+        canvasContext: ctx,
+        viewport,
+      });
+      return renderTask.promise;
+    });
+  })
+  .catch(function (reason) {
+    console.error("Error: " + reason);
+  });
--- a/examples/webpack/main.mjs
+++ b/examples/webpack/main.mjs
@ -1,29 +0,0 @@
-// Any copyright is dedicated to the Public Domain.
-// http://creativecommons.org/licenses/publicdomain/
-
-// Hello world example for webpack.
-
-import * as pdfjsLib from "pdfjs-dist";
-
-const pdfPath = "../learning/helloworld.pdf";
-
-// Setting worker path to worker bundle.
-pdfjsLib.GlobalWorkerOptions.workerSrc =
-  "../../build/webpack/pdf.worker.bundle.js";
-
-// Loading a document.
-const loadingTask = pdfjsLib.getDocument(pdfPath);
-const pdfDocument = await loadingTask.promise;
-// Request a first page
-const pdfPage = await pdfDocument.getPage(1);
-// Display page on the existing canvas with 100% scale.
-const viewport = pdfPage.getViewport({ scale: 1.0 });
-const canvas = document.getElementById("theCanvas");
-canvas.width = viewport.width;
-canvas.height = viewport.height;
-const ctx = canvas.getContext("2d");
-const renderTask = pdfPage.render({
-  canvasContext: ctx,
-  viewport,
-});
-await renderTask.promise;
--- a/examples/webpack/package.json
+++ b/examples/webpack/package.json
@ -1,12 +1,12 @@
 {
  "name": "webpack-pdf.js-example",
-  "version": "0.2.0",
+  "version": "0.1.0",
  "scripts": {
    "build": "webpack"
  },
  "devDependencies": {
-    "webpack": "^5.89.0",
-    "webpack-cli": "^5.1.4",
+    "webpack": "^5.11.1",
+    "webpack-cli": "^4.3.1",
    "pdfjs-dist": "../../node_modules/pdfjs-dist"
  }
 }
--- a/examples/webpack/webpack.config.js
+++ b/examples/webpack/webpack.config.js
@ -1,13 +1,11 @@
-/* eslint-disable import/no-commonjs */
-
 const webpack = require("webpack"); // eslint-disable-line no-unused-vars
 const path = require("path");

 module.exports = {
  context: __dirname,
  entry: {
-    main: "./main.mjs",
-    "pdf.worker": "pdfjs-dist/build/pdf.worker.mjs",
+    main: "./main.js",
+    "pdf.worker": "pdfjs-dist/build/pdf.worker.entry",
  },
  mode: "none",
  output: {
--- a/extensions/chromium/.eslintrc
+++ b/extensions/chromium/.eslintrc
@ -18,5 +18,6 @@
  "rules": {
    "mozilla/import-globals": "error",
    "no-var": "off",
+    "object-shorthand": "off",
  },
 }
--- a/extensions/chromium/contentscript.js
+++ b/extensions/chromium/contentscript.js
@ -22,7 +22,11 @@ function getViewerURL(pdf_url) {
  return VIEWER_URL + "?file=" + encodeURIComponent(pdf_url);
 }

-document.addEventListener("animationstart", onAnimationStart, true);
+if (CSS.supports("animation", "0s")) {
+  document.addEventListener("animationstart", onAnimationStart, true);
+} else {
+  document.addEventListener("webkitAnimationStart", onAnimationStart, true);
+}

 function onAnimationStart(event) {
  if (event.animationName === "pdfjs-detected-object-or-embed") {
@ -124,15 +128,11 @@ function updateEmbedElement(elem) {
  var parentNode = elem.parentNode;
  var nextSibling = elem.nextSibling;
  if (parentNode) {
-    elem.remove();
+    parentNode.removeChild(elem);
  }
  elem.type = "text/html";
  elem.src = getEmbeddedViewerURL(elem.src);
-
  if (parentNode) {
-    // Suppress linter warning: insertBefore is preferable to
-    // nextSibling.before(elem) because nextSibling may be null.
-    // eslint-disable-next-line unicorn/prefer-modern-dom-apis
    parentNode.insertBefore(elem, nextSibling);
  }
 }
@ -160,7 +160,7 @@ function updateObjectElement(elem) {
  if (!iframe || !iframe.__inserted_by_pdfjs) {
    iframe = createFullSizeIframe();
    elem.textContent = "";
-    elem.append(iframe);
+    elem.appendChild(iframe);
    iframe.__inserted_by_pdfjs = true;
  }
  iframe.src = getEmbeddedViewerURL(elem.data);
--- a/extensions/chromium/contentstyle.css
+++ b/extensions/chromium/contentstyle.css
@ -1,6 +1,11 @@
 /**
 * Detect creation of <embed> and <object> tags.
 */
+@-webkit-keyframes pdfjs-detected-object-or-embed {
+  from {
+    /* empty */
+  }
+}
@keyframes pdfjs-detected-object-or-embed {
  from {
    /* empty */
@ -8,6 +13,9 @@
 }
 object,
 embed {
+  -webkit-animation-delay: 0s !important;
+  -webkit-animation-name: pdfjs-detected-object-or-embed !important;
+  -webkit-animation-play-state: running !important;
  animation-delay: 0s !important;
  animation-name: pdfjs-detected-object-or-embed !important;
  animation-play-state: running !important;
--- a/extensions/chromium/extension-router.js
+++ b/extensions/chromium/extension-router.js
@ -47,7 +47,7 @@ limitations under the License.
    }
    var scheme = url.slice(0, schemeIndex).toLowerCase();
    if (schemes.includes(scheme)) {
-      url = url.split("#", 1)[0];
+      url = url.split("#")[0];
      if (url.charAt(schemeIndex) === ":") {
        url = encodeURIComponent(url);
      }
@ -95,8 +95,8 @@ limitations under the License.
      url: CRX_BASE_URL + "*:*",
    },
    function (tabsFromLastSession) {
-      for (const { id } of tabsFromLastSession) {
-        chrome.tabs.reload(id);
+      for (var i = 0; i < tabsFromLastSession.length; ++i) {
+        chrome.tabs.reload(tabsFromLastSession[i].id);
      }
    }
  );
--- a/extensions/chromium/manifest.json
+++ b/extensions/chromium/manifest.json
@ -1,5 +1,4 @@
 {
-  "minimum_chrome_version": "88",
  "manifest_version": 2,
  "name": "PDF Viewer",
  "version": "PDFJSSCRIPT_VERSION",
@ -11,30 +10,32 @@
  },
  "permissions": [
    "fileBrowserHandler",
-    "webRequest",
-    "webRequestBlocking",
+    "webRequest", "webRequestBlocking",
    "<all_urls>",
    "tabs",
    "webNavigation",
    "storage"
  ],
-  "content_scripts": [
-    {
-      "matches": ["http://*/*", "https://*/*", "ftp://*/*", "file://*/*"],
+  "content_scripts": [{
+    "matches": [
+      "http://*/*",
+      "https://*/*",
+      "ftp://*/*",
+      "file://*/*"
+    ],
    "run_at": "document_start",
    "all_frames": true,
    "css": ["contentstyle.css"],
    "js": ["contentscript.js"]
-    }
-  ],
+  }],
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
-  "file_browser_handlers": [
-    {
+  "file_browser_handlers": [{
    "id": "open-as-pdf",
    "default_title": "Open with PDF Viewer",
-      "file_filters": ["filesystem:*.pdf"]
-    }
-  ],
+    "file_filters": [
+      "filesystem:*.pdf"
+    ]
+  }],
  "storage": {
    "managed_schema": "preferences_schema.json"
  },
--- a/extensions/chromium/options/migration.js
+++ b/extensions/chromium/options/migration.js
@ -109,10 +109,17 @@ limitations under the License.
        }
        // Migration code for https://github.com/mozilla/pdf.js/pull/9479.
        if (typeof items.disableTextLayer === "boolean") {
+          var textLayerMode = 1;
          if (items.disableTextLayer) {
+            textLayerMode = 0;
+          } else if (items.enhanceTextSelection) {
+            textLayerMode = 2;
+          }
+          if (textLayerMode !== 1) {
+            // Overwrite if computed textLayerMode is not the default value (1).
            storageSync.set(
              {
-                textLayerMode: 0,
+                textLayerMode: textLayerMode,
              },
              function () {
                if (!chrome.runtime.lastError) {
--- a/extensions/chromium/options/options.html
+++ b/extensions/chromium/options/options.html
@ -43,19 +43,6 @@ body {
 </div>
 </template>

-<template id="viewerCssTheme-template">
-<div class="settings-row">
-  <label>
-    <span></span>
-    <select>
-      <option value="0">Use system theme</option>
-      <option value="1">Light theme</option>
-      <option value="2">Dark theme</option>
-    </select>
-  </label>
-</div>
-</template>
-
 <template id="viewOnLoad-template">
 <div class="settings-row">
  <label>
@ -126,6 +113,7 @@ body {
    <select>
      <option value="0">Disable text selection</option>
      <option value="1">Enable text selection</option>
+      <option value="2">Enable enhanced mode (experimental)</option>
    </select>
  </label>
 </div>
@ -152,7 +140,6 @@ body {
    <span></span>
    <select>
      <option value="-1">Default</option>
-      <option value="3">Page scrolling</option>
      <option value="0">Vertical scrolling</option>
      <option value="1">Horizontal scrolling</option>
      <option value="2">Wrapped scrolling</option>
--- a/extensions/chromium/options/options.js
+++ b/extensions/chromium/options/options.js
@ -155,7 +155,7 @@ function renderBooleanPref(shortDescription, description, prefName) {
    storageArea.set(pref);
  };
  wrapper.querySelector("span").textContent = shortDescription;
-  document.getElementById("settings-boxes").append(wrapper);
+  document.getElementById("settings-boxes").appendChild(wrapper);

  function renderPreference(value) {
    checkbox.checked = value;
@ -172,7 +172,7 @@ function renderEnumPref(shortDescription, prefName) {
    storageArea.set(pref);
  };
  wrapper.querySelector("span").textContent = shortDescription;
-  document.getElementById("settings-boxes").append(wrapper);
+  document.getElementById("settings-boxes").appendChild(wrapper);

  function renderPreference(value) {
    select.value = value;
@ -189,7 +189,7 @@ function renderDefaultZoomValue(shortDescription) {
    });
  };
  wrapper.querySelector("span").textContent = shortDescription;
-  document.getElementById("settings-boxes").append(wrapper);
+  document.getElementById("settings-boxes").appendChild(wrapper);

  function renderPreference(value) {
    value = value || "auto";
--- a/extensions/chromium/pageAction/background.js
+++ b/extensions/chromium/pageAction/background.js
@ -28,7 +28,7 @@ limitations under the License.
    if (url) {
      url = url[1];
      chrome.pageAction.setPopup({
-        tabId,
+        tabId: tabId,
        popup: "/pageAction/popup.html?file=" + encodeURIComponent(url),
      });
      chrome.pageAction.show(tabId);
--- a/extensions/chromium/pdfHandler-vcros.js
+++ b/extensions/chromium/pdfHandler-vcros.js
@ -78,9 +78,9 @@ limitations under the License.
    if (windowId) {
      chrome.tabs.create(
        {
-          windowId,
+          windowId: windowId,
          active: true,
-          url,
+          url: url,
        },
        function () {
          openViewer(windowId, fileEntries);
@ -91,7 +91,7 @@ limitations under the License.
        {
          type: "normal",
          focused: true,
-          url,
+          url: url,
        },
        function (chromeWindow) {
          openViewer(chromeWindow.id, fileEntries);
--- a/extensions/chromium/pdfHandler.js
+++ b/extensions/chromium/pdfHandler.js
@ -20,15 +20,7 @@ limitations under the License.
 var VIEWER_URL = chrome.extension.getURL("content/web/viewer.html");

 function getViewerURL(pdf_url) {
-  // |pdf_url| may contain a fragment such as "#page=2". That should be passed
-  // as a fragment to the viewer, not encoded in pdf_url.
-  var hash = "";
-  var i = pdf_url.indexOf("#");
-  if (i > 0) {
-    hash = pdf_url.slice(i);
-    pdf_url = pdf_url.slice(0, i);
-  }
-  return VIEWER_URL + "?file=" + encodeURIComponent(pdf_url) + hash;
+  return VIEWER_URL + "?file=" + encodeURIComponent(pdf_url);
 }

 /**
@ -62,7 +54,8 @@ function isPdfDownloadable(details) {
 * @returns {undefined|{name: string, value: string}} The header, if found.
 */
 function getHeaderFromHeaders(headers, headerName) {
-  for (const header of headers) {
+  for (var i = 0; i < headers.length; ++i) {
+    var header = headers[i];
    if (header.name.toLowerCase() === headerName) {
      return header;
    }
@ -162,7 +155,19 @@ chrome.webRequest.onBeforeRequest.addListener(
    return { redirectUrl: viewerUrl };
  },
  {
-    urls: ["file://*/*.pdf", "file://*/*.PDF"],
+    urls: [
+      "file://*/*.pdf",
+      "file://*/*.PDF",
+      ...// Duck-typing: MediaError.prototype.message was added in Chrome 59.
+      (MediaError.prototype.hasOwnProperty("message")
+        ? []
+        : [
+            // Note: Chrome 59 has disabled ftp resource loading by default:
+            // https://www.chromestatus.com/feature/5709390967472128
+            "ftp://*/*.pdf",
+            "ftp://*/*.PDF",
+          ]),
+    ],
    types: ["main_frame", "sub_frame"],
  },
  ["blocking"]
@ -237,14 +242,21 @@ chrome.runtime.onMessage.addListener(function (message, sender, sendResponse) {
      chrome.tabs.create({
        windowId: sender.tab.windowId,
        index: sender.tab.index + 1,
-        url,
+        url: url,
        openerTabId: sender.tab.id,
      });
    } else {
      chrome.tabs.update(sender.tab.id, {
-        url,
+        url: url,
      });
    }
  }
  return undefined;
 });
+
+// Remove keys from storage that were once part of the deleted feature-detect.js
+chrome.storage.local.remove([
+  "featureDetectLastUA",
+  "webRequestRedirectUrl",
+  "extensionSupportsFTP",
+]);
--- a/extensions/chromium/preferences_schema.json
+++ b/extensions/chromium/preferences_schema.json
@ -1,13 +1,6 @@
 {
  "type": "object",
  "properties": {
-    "viewerCssTheme": {
-      "title": "Theme",
-      "description": "The theme to use.\n0 = Use system theme.\n1 = Light theme.\n2 = Dark theme.",
-      "type": "integer",
-      "enum": [0, 1, 2],
-      "default": 2
-    },
    "showPreviousViewOnLoad": {
      "description": "DEPRECATED. Set viewOnLoad to 1 to disable showing the last page/position on load.",
      "type": "boolean",
@ -17,15 +10,13 @@
      "title": "View position on load",
      "description": "The position in the document upon load.\n -1 = Default (uses OpenAction if available, otherwise equal to `viewOnLoad = 0`).\n 0 = The last viewed page/position.\n 1 = The initial page/position.",
      "type": "integer",
-      "enum": [-1, 0, 1],
+      "enum": [
+        -1,
+        0,
+        1
+      ],
      "default": 0
    },
-    "defaultZoomDelay": {
-      "title": "Default zoom delay",
-      "description": "Delay (in ms) to wait before redrawing the canvas.",
-      "type": "integer",
-      "default": 400
-    },
    "defaultZoomValue": {
      "title": "Default zoom level",
      "description": "Default zoom level of the viewer. Accepted values: 'auto', 'page-actual', 'page-width', 'page-height', 'page-fit', or a zoom level in percents.",
@ -37,7 +28,13 @@
      "title": "Sidebar state on load",
      "description": "Controls the state of the sidebar upon load.\n -1 = Default (uses PageMode if available, otherwise the last position if available/enabled).\n 0 = Do not show sidebar.\n 1 = Show thumbnails in sidebar.\n 2 = Show document outline in sidebar.\n 3 = Show attachments in sidebar.",
      "type": "integer",
-      "enum": [-1, 0, 1, 2, 3],
+      "enum": [
+        -1,
+        0,
+        1,
+        2,
+        3
+      ],
      "default": -1
    },
    "enableHandToolOnLoad": {
@ -45,15 +42,14 @@
      "type": "boolean",
      "default": false
    },
-    "enableML": {
-      "type": "boolean",
-      "default": false
-    },
    "cursorToolOnLoad": {
      "title": "Cursor tool on load",
      "description": "The cursor tool that is enabled upon load.\n 0 = Text selection tool.\n 1 = Hand tool.",
      "type": "integer",
-      "enum": [0, 1],
+      "enum": [
+        0,
+        1
+      ],
      "default": 0
    },
    "pdfBugEnabled": {
@ -62,28 +58,6 @@
      "type": "boolean",
      "default": false
    },
-    "enableScripting": {
-      "title": "Enable active content (JavaScript) in PDFs",
-      "type": "boolean",
-      "description": "Whether to allow execution of active content (JavaScript) by PDF files.",
-      "default": false
-    },
-    "enableHighlightEditor": {
-      "type": "boolean",
-      "default": false
-    },
-    "enableHighlightFloatingButton": {
-      "type": "boolean",
-      "default": false
-    },
-    "highlightEditorColors": {
-      "type": "string",
-      "default": "yellow=#FFFF98,green=#53FFBC,blue=#80EBFF,pink=#FFCBE6,red=#FF4F5F"
-    },
-    "enableStampEditor": {
-      "type": "boolean",
-      "default": true
-    },
    "disableRange": {
      "title": "Disable range requests",
      "description": "Whether to disable range requests (not recommended).",
@ -111,18 +85,37 @@
      "type": "boolean",
      "default": false
    },
+    "enhanceTextSelection": {
+      "description": "DEPRECATED. Set textLayerMode to 2 to use the enhanced text selection layer by default.",
+      "type": "boolean",
+      "default": false
+    },
    "textLayerMode": {
      "title": "Text layer mode",
-      "description": "Controls if the text layer is enabled, and the selection mode that is used.\n 0 = Disabled.\n 1 = Enabled.",
+      "description": "Controls if the text layer is enabled, and the selection mode that is used.\n 0 = Disabled.\n 1 = Enabled.\n 2 = (Experimental) Enabled, with enhanced text selection.",
      "type": "integer",
-      "enum": [0, 1],
+      "enum": [
+        0,
+        1,
+        2
+      ],
      "default": 1
    },
+    "useOnlyCssZoom": {
+      "type": "boolean",
+      "default": false
+    },
    "externalLinkTarget": {
      "title": "External links target window",
      "description": "Controls how external links will be opened.\n 0 = default.\n 1 = replaces current window.\n 2 = new window/tab.\n 3 = parent.\n 4 = in top window.",
      "type": "integer",
-      "enum": [0, 1, 2, 3, 4],
+      "enum": [
+        0,
+        1,
+        2,
+        3,
+        4
+      ],
      "default": 0
    },
    "disablePageLabels": {
@ -140,15 +133,13 @@
      "description": "Whether to prevent the extension from reporting the extension and browser version to the extension developers.",
      "default": false
    },
-    "annotationMode": {
-      "type": "integer",
-      "enum": [0, 1, 2, 3],
-      "default": 2
+    "renderInteractiveForms": {
+      "type": "boolean",
+      "default": true
    },
-    "annotationEditorMode": {
-      "type": "integer",
-      "enum": [-1, 0, 3, 15],
-      "default": 0
+    "enableScripting": {
+      "type": "boolean",
+      "default": true
    },
    "enablePermissions": {
      "type": "boolean",
@ -156,7 +147,7 @@
    },
    "enableXfa": {
      "type": "boolean",
-      "default": true
+      "default": false
    },
    "historyUpdateUrl": {
      "type": "boolean",
@ -176,32 +167,36 @@
    },
    "scrollModeOnLoad": {
      "title": "Scroll mode on load",
-      "description": "Controls how the viewer scrolls upon load.\n -1 = Default (uses the last position if available/enabled).\n 3 = Page scrolling.\n 0 = Vertical scrolling.\n 1 = Horizontal scrolling.\n 2 = Wrapped scrolling.",
+      "description": "Controls how the viewer scrolls upon load.\n -1 = Default (uses the last position if available/enabled).\n 0 = Vertical scrolling.\n 1 = Horizontal scrolling.\n 2 = Wrapped scrolling.",
      "type": "integer",
-      "enum": [-1, 0, 1, 2, 3],
+      "enum": [
+        -1,
+        0,
+        1,
+        2
+      ],
      "default": -1
    },
    "spreadModeOnLoad": {
      "title": "Spread mode on load",
      "description": "Whether the viewer should join pages into spreads upon load.\n -1 = Default (uses the last position if available/enabled).\n 0 = No spreads.\n 1 = Odd spreads.\n 2 = Even spreads.",
      "type": "integer",
-      "enum": [-1, 0, 1, 2],
+      "enum": [
+        -1,
+        0,
+        1,
+        2
+      ],
      "default": -1
    },
-    "forcePageColors": {
-      "description": "When enabled, the pdf rendering will use the high contrast mode colors",
-      "type": "boolean",
-      "default": false
-    },
-    "pageColorsBackground": {
-      "description": "The color is a string as defined in CSS. Its goal is to help improve readability in high contrast mode",
-      "type": "string",
-      "default": "Canvas"
-    },
-    "pageColorsForeground": {
-      "description": "The color is a string as defined in CSS. Its goal is to help improve readability in high contrast mode",
-      "type": "string",
-      "default": "CanvasText"
+    "viewerCssTheme": {
+      "type": "integer",
+      "enum": [
+        0,
+        1,
+        2
+      ],
+      "default": 0
    }
  }
 }
--- a/extensions/chromium/preserve-referer.js
+++ b/extensions/chromium/preserve-referer.js
@ -14,7 +14,6 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 /* import-globals-from pdfHandler.js */
-/* exported saveReferer */

 "use strict";
 /**
@ -42,18 +41,30 @@ var g_requestHeaders = {};
 // g_referrers[tabId][frameId] = referrer of PDF frame.
 var g_referrers = {};

+var extraInfoSpecWithHeaders; // = ['requestHeaders', 'extraHeaders']
+
 (function () {
  var requestFilter = {
    urls: ["*://*/*"],
    types: ["main_frame", "sub_frame"],
  };
+  function registerListener(extraInfoSpec) {
+    extraInfoSpecWithHeaders = extraInfoSpec;
+    // May throw if the given extraInfoSpec is unsupported.
    chrome.webRequest.onSendHeaders.addListener(
      function (details) {
        g_requestHeaders[details.requestId] = details.requestHeaders;
      },
      requestFilter,
-    ["requestHeaders", "extraHeaders"]
+      extraInfoSpec
    );
+  }
+  try {
+    registerListener(["requestHeaders", "extraHeaders"]);
+  } catch (e) {
+    // "extraHeaders" is not supported in Chrome 71 and earlier.
+    registerListener(["requestHeaders"]);
+  }
  chrome.webRequest.onBeforeRedirect.addListener(forgetHeaders, requestFilter);
  chrome.webRequest.onCompleted.addListener(forgetHeaders, requestFilter);
  chrome.webRequest.onErrorOccurred.addListener(forgetHeaders, requestFilter);
@ -112,9 +123,9 @@ chrome.runtime.onConnect.addListener(function onReceivePort(port) {
        {
          urls: [data.requestUrl],
          types: ["xmlhttprequest"],
-          tabId,
+          tabId: tabId,
        },
-        ["blocking", "requestHeaders", "extraHeaders"]
+        ["blocking", ...extraInfoSpecWithHeaders]
      );
    }
    // Acknowledge the message, and include the latest referer for this frame.
@ -137,7 +148,7 @@ chrome.runtime.onConnect.addListener(function onReceivePort(port) {
    {
      urls: ["https://*/*"],
      types: ["xmlhttprequest"],
-      tabId,
+      tabId: tabId,
    },
    ["blocking", "responseHeaders"]
  );
--- a/extensions/chromium/telemetry.js
+++ b/extensions/chromium/telemetry.js
@ -70,6 +70,12 @@ limitations under the License.

      var deduplication_id = getDeduplicationId(wasUpdated);
      var extension_version = chrome.runtime.getManifest().version;
+      if (window.Request && "mode" in Request.prototype) {
+        // fetch is supported in extensions since Chrome 42 (though the above
+        // feature-detection method detects Chrome 43+).
+        // Unlike XMLHttpRequest, fetch omits credentials such as cookies in the
+        // requests, which guarantees that the server cannot track the client
+        // via HTTP cookies.
        fetch(LOG_URL, {
          method: "POST",
          headers: new Headers({
@ -79,11 +85,14 @@ limitations under the License.
          // Set mode=cors so that the above custom headers are included in the
          // request.
          mode: "cors",
-        // Omits credentials such as cookies in the requests, which guarantees
-        // that the server cannot track the client via HTTP cookies.
-        credentials: "omit",
-        cache: "no-store",
        });
+        return;
+      }
+      var x = new XMLHttpRequest();
+      x.open("POST", LOG_URL);
+      x.setRequestHeader("Deduplication-Id", deduplication_id);
+      x.setRequestHeader("Extension-Version", extension_version);
+      x.send();
    });
  }

@ -101,7 +110,8 @@ limitations under the License.
      id = "";
      var buf = new Uint8Array(5);
      crypto.getRandomValues(buf);
-      for (const c of buf) {
+      for (var i = 0; i < buf.length; ++i) {
+        var c = buf[i];
        id += (c >>> 4).toString(16) + (c & 0xf).toString(16);
      }
      localStorage.telemetryDeduplicationId = id;
--- a/extensions/firefox/.eslintrc
+++ b/extensions/firefox/.eslintrc
@ -6,11 +6,18 @@
    "plugin:mozilla/recommended",
  ],

+  "parserOptions": {
+    "sourceType": "script",
+  },
+
  "plugins": [
    "mozilla"
  ],

  "rules": {
+    // Items different from the mozilla/recommended configuration.
+    "no-var": "off",
+
    // Other rules mozilla/recommended hasn't enabled yet.
    "no-shadow": "error",
    "arrow-body-style": ["error", "as-needed"],
--- a/extensions/firefox/README.mozilla
+++ b/extensions/firefox/README.mozilla
@ -0,0 +1,5 @@
+This is the PDF.js project output, https://github.com/mozilla/pdf.js
+
+Current extension version is: PDFJSSCRIPT_VERSION
+
+Taken from upstream commit: PDFJSSCRIPT_COMMIT
--- a/extensions/firefox/content/PdfJsDefaultPreferences.sys.mjs
+++ b/extensions/firefox/content/PdfJsDefaultPreferences.sys.mjs
@ -13,6 +13,10 @@
 * limitations under the License.
 */

-export const PdfJsDefaultPreferences = Object.freeze(
+"use strict";
+
+var EXPORTED_SYMBOLS = ["PdfJsDefaultPreferences"];
+
+var PdfJsDefaultPreferences = Object.freeze(
  PDFJSDev.eval("DEFAULT_PREFERENCES")
 );
--- a/extensions/firefox/tools/l10n.js
+++ b/extensions/firefox/tools/l10n.js
@ -0,0 +1,131 @@
+"use strict";
+
+// Small subset of the webL10n API by Fabien Cazenave for PDF.js extension.
+(function (window) {
+  var gLanguage = "";
+  var gExternalLocalizerServices = null;
+  var gReadyState = "loading";
+
+  // fetch an l10n objects
+  function getL10nData(key) {
+    var response = gExternalLocalizerServices.getStrings(key);
+    var data = JSON.parse(response);
+    if (!data) {
+      console.warn("[l10n] #" + key + " missing for [" + gLanguage + "]");
+    }
+    return data;
+  }
+
+  // replace {{arguments}} with their values
+  function substArguments(text, args) {
+    if (!args) {
+      return text;
+    }
+    return text.replace(/\{\{\s*(\w+)\s*\}\}/g, function (all, name) {
+      return name in args ? args[name] : "{{" + name + "}}";
+    });
+  }
+
+  // translate a string
+  function translateString(key, args, fallback) {
+    var i = key.lastIndexOf(".");
+    var name, property;
+    if (i >= 0) {
+      name = key.substring(0, i);
+      property = key.substring(i + 1);
+    } else {
+      name = key;
+      property = "textContent";
+    }
+    var data = getL10nData(name);
+    var value = (data && data[property]) || fallback;
+    if (!value) {
+      return "{{" + key + "}}";
+    }
+    return substArguments(value, args);
+  }
+
+  // translate an HTML element
+  function translateElement(element) {
+    if (!element || !element.dataset) {
+      return;
+    }
+
+    // get the related l10n object
+    var key = element.dataset.l10nId;
+    var data = getL10nData(key);
+    if (!data) {
+      return;
+    }
+
+    // get arguments (if any)
+    // TODO: more flexible parser?
+    var args;
+    if (element.dataset.l10nArgs) {
+      try {
+        args = JSON.parse(element.dataset.l10nArgs);
+      } catch (e) {
+        console.warn("[l10n] could not parse arguments for #" + key + "");
+      }
+    }
+
+    // translate element
+    // TODO: security check?
+    for (var k in data) {
+      element[k] = substArguments(data[k], args);
+    }
+  }
+
+  // translate an HTML subtree
+  function translateFragment(element) {
+    element = element || document.querySelector("html");
+
+    // check all translatable children (= w/ a `data-l10n-id' attribute)
+    var children = element.querySelectorAll("*[data-l10n-id]");
+    var elementCount = children.length;
+    for (var i = 0; i < elementCount; i++) {
+      translateElement(children[i]);
+    }
+
+    // translate element itself if necessary
+    if (element.dataset.l10nId) {
+      translateElement(element);
+    }
+  }
+
+  // Public API
+  document.mozL10n = {
+    // get a localized string
+    get: translateString,
+
+    // get the document language
+    getLanguage() {
+      return gLanguage;
+    },
+
+    // get the direction (ltr|rtl) of the current language
+    getDirection() {
+      // http://www.w3.org/International/questions/qa-scripts
+      // Arabic, Hebrew, Farsi, Pashto, Urdu
+      var rtlList = ["ar", "he", "fa", "ps", "ur"];
+
+      // use the short language code for "full" codes like 'ar-sa' (issue 5440)
+      var shortCode = gLanguage.split("-")[0];
+
+      return rtlList.includes(shortCode) ? "rtl" : "ltr";
+    },
+
+    getReadyState() {
+      return gReadyState;
+    },
+
+    setExternalLocalizerServices(externalLocalizerServices) {
+      gExternalLocalizerServices = externalLocalizerServices;
+      gLanguage = gExternalLocalizerServices.getLocale();
+      gReadyState = "complete";
+    },
+
+    // translate an element or document fragment
+    translate: translateFragment,
+  };
+})(this);
--- a/external/builder/babel-plugin-pdfjs-preprocessor.mjs
+++ b/external/builder/babel-plugin-pdfjs-preprocessor.mjs
@ -1,253 +0,0 @@
-import { types as t, transformSync } from "@babel/core";
-import fs from "fs";
-import { join as joinPaths } from "path";
-import vm from "vm";
-
-const PDFJS_PREPROCESSOR_NAME = "PDFJSDev";
-const ROOT_PREFIX = "$ROOT/";
-
-function isPDFJSPreprocessor(obj) {
-  return obj.type === "Identifier" && obj.name === PDFJS_PREPROCESSOR_NAME;
-}
-
-function evalWithDefines(code, defines) {
-  if (!code || !code.trim()) {
-    throw new Error("No JavaScript expression given");
-  }
-  return vm.runInNewContext(code, defines, { displayErrors: false });
-}
-
-function handlePreprocessorAction(ctx, actionName, args, path) {
-  try {
-    const arg = args[0];
-    switch (actionName) {
-      case "test":
-        if (!t.isStringLiteral(arg)) {
-          throw new Error("No code for testing is given");
-        }
-        return !!evalWithDefines(arg.value, ctx.defines);
-      case "eval":
-        if (!t.isStringLiteral(arg)) {
-          throw new Error("No code for eval is given");
-        }
-        const result = evalWithDefines(arg.value, ctx.defines);
-        if (
-          typeof result === "boolean" ||
-          typeof result === "string" ||
-          typeof result === "number" ||
-          typeof result === "object"
-        ) {
-          return result;
-        }
-        break;
-      case "json":
-        if (!t.isStringLiteral(arg)) {
-          throw new Error("Path to JSON is not provided");
-        }
-        let jsonPath = arg.value;
-        if (jsonPath.startsWith(ROOT_PREFIX)) {
-          jsonPath = joinPaths(
-            ctx.rootPath,
-            jsonPath.substring(ROOT_PREFIX.length)
-          );
-        }
-        return JSON.parse(fs.readFileSync(jsonPath, "utf8"));
-    }
-    throw new Error("Unsupported action");
-  } catch (e) {
-    throw path.buildCodeFrameError(
-      "Could not process " +
-        PDFJS_PREPROCESSOR_NAME +
-        "." +
-        actionName +
-        ": " +
-        e.message
-    );
-  }
-}
-
-function babelPluginPDFJSPreprocessor(babel, ctx) {
-  return {
-    name: "babel-plugin-pdfjs-preprocessor",
-    manipulateOptions({ parserOpts }) {
-      parserOpts.attachComment = false;
-    },
-    visitor: {
-      "ExportNamedDeclaration|ImportDeclaration": ({ node }) => {
-        if (node.source && ctx.map?.[node.source.value]) {
-          node.source.value = ctx.map[node.source.value];
-        }
-      },
-      "IfStatement|ConditionalExpression": {
-        exit(path) {
-          const { node } = path;
-          if (t.isBooleanLiteral(node.test)) {
-            // if (true) stmt1; => stmt1
-            // if (false) stmt1; else stmt2; => stmt2
-            if (node.test.value === true) {
-              path.replaceWith(node.consequent);
-            } else if (node.alternate) {
-              path.replaceWith(node.alternate);
-            } else {
-              path.remove(node);
-            }
-          }
-        },
-      },
-      UnaryExpression: {
-        exit(path) {
-          const { node } = path;
-          if (
-            node.operator === "typeof" &&
-            isPDFJSPreprocessor(node.argument)
-          ) {
-            // typeof PDFJSDev => 'object'
-            path.replaceWith(t.stringLiteral("object"));
-            return;
-          }
-          if (node.operator === "!" && t.isBooleanLiteral(node.argument)) {
-            // !true => false,  !false => true
-            path.replaceWith(t.booleanLiteral(!node.argument.value));
-          }
-        },
-      },
-      LogicalExpression: {
-        exit(path) {
-          const { node } = path;
-          if (!t.isBooleanLiteral(node.left)) {
-            return;
-          }
-
-          switch (node.operator) {
-            case "&&":
-              // true && expr => expr
-              // false && expr => false
-              path.replaceWith(
-                node.left.value === true ? node.right : node.left
-              );
-              break;
-            case "||":
-              // true || expr => true
-              // false || expr => expr
-              path.replaceWith(
-                node.left.value === true ? node.left : node.right
-              );
-              break;
-          }
-        },
-      },
-      BinaryExpression: {
-        exit(path) {
-          const { node } = path;
-          switch (node.operator) {
-            case "==":
-            case "===":
-            case "!=":
-            case "!==":
-              if (t.isLiteral(node.left) && t.isLiteral(node.right)) {
-                // folding == and != check that can be statically evaluated
-                const { confident, value } = path.evaluate();
-                if (confident) {
-                  path.replaceWith(t.booleanLiteral(value));
-                }
-              }
-          }
-        },
-      },
-      CallExpression(path) {
-        const { node } = path;
-        if (
-          t.isMemberExpression(node.callee) &&
-          isPDFJSPreprocessor(node.callee.object) &&
-          t.isIdentifier(node.callee.property) &&
-          !node.callee.computed
-        ) {
-          // PDFJSDev.xxxx(arg1, arg2, ...) => transform
-          const action = node.callee.property.name;
-          const result = handlePreprocessorAction(
-            ctx,
-            action,
-            node.arguments,
-            path
-          );
-          path.replaceWith(t.inherits(t.valueToNode(result), path.node));
-        }
-
-        if (t.isIdentifier(node.callee, { name: "__non_webpack_import__" })) {
-          if (node.arguments.length !== 1) {
-            throw new Error("Invalid `__non_webpack_import__` usage.");
-          }
-          // Replace it with a standard `import`-call and
-          // ensure that Webpack will leave it alone.
-          const source = node.arguments[0];
-          source.leadingComments = [
-            {
-              type: "CommentBlock",
-              value: "webpackIgnore: true",
-            },
-          ];
-          path.replaceWith(t.importExpression(source));
-        }
-      },
-      BlockStatement: {
-        // Visit node in post-order so that recursive flattening
-        // of blocks works correctly.
-        exit(path) {
-          const { node } = path;
-
-          let subExpressionIndex = 0;
-          while (subExpressionIndex < node.body.length) {
-            switch (node.body[subExpressionIndex].type) {
-              case "EmptyStatement":
-                // Removing empty statements from the blocks.
-                node.body.splice(subExpressionIndex, 1);
-                continue;
-              case "BlockStatement":
-                // Block statements inside a block are flattened
-                // into the parent one.
-                const subChildren = node.body[subExpressionIndex].body;
-                node.body.splice(subExpressionIndex, 1, ...subChildren);
-                subExpressionIndex += Math.max(subChildren.length - 1, 0);
-                continue;
-              case "ReturnStatement":
-              case "ThrowStatement":
-                // Removing dead code after return or throw.
-                node.body.splice(
-                  subExpressionIndex + 1,
-                  node.body.length - subExpressionIndex - 1
-                );
-                break;
-            }
-            subExpressionIndex++;
-          }
-        },
-      },
-      Function: {
-        exit(path) {
-          if (!t.isBlockStatement(path.node.body)) {
-            // Arrow function with expression body
-            return;
-          }
-
-          const { body } = path.node.body;
-          if (
-            body.length > 0 &&
-            t.isReturnStatement(body.at(-1), { argument: null })
-          ) {
-            // Function body ends with return without arg -- removing it.
-            body.pop();
-          }
-        },
-      },
-    },
-  };
-}
-
-function preprocessPDFJSCode(ctx, content) {
-  return transformSync(content, {
-    configFile: false,
-    plugins: [[babelPluginPDFJSPreprocessor, ctx]],
-  }).code;
-}
-
-export { babelPluginPDFJSPreprocessor, preprocessPDFJSCode };
--- a/external/builder/builder.mjs
+++ b/external/builder/builder.mjs
@ -1,8 +1,8 @@
-import fs from "fs";
-import path from "path";
-import vm from "vm";
+"use strict";

-const AllWhitespaceRegexp = /^\s+$/g;
+const fs = require("fs"),
+  path = require("path"),
+  vm = require("vm");

 /**
 * A simple preprocessor that is based on the Firefox preprocessor
@ -38,32 +38,10 @@ function preprocess(inFilename, outFilename, defines) {
    return fs.realpathSync(inFilename) + ":" + lineNumber;
  }

-  function expandCssImports(content, baseUrl) {
-    return content.replaceAll(
-      /^\s*@import\s+url\(([^)]+)\);\s*$/gm,
-      function (all, url) {
-        if (defines.GECKOVIEW) {
-          switch (url) {
-            case "annotation_editor_layer_builder.css":
-              return "";
-          }
-        }
-        const file = path.join(path.dirname(baseUrl), url);
-        const imported = fs.readFileSync(file, "utf8").toString();
-        return expandCssImports(imported, file);
-      }
-    );
-  }
-
  // TODO make this really read line by line.
-  let content = fs.readFileSync(inFilename, "utf8").toString();
-  // Handle CSS-imports first, when necessary.
-  if (/\.css$/i.test(inFilename)) {
-    content = expandCssImports(content, inFilename);
-  }
-  const lines = content.split("\n"),
-    totalLines = lines.length;
-  const out = [];
+  const lines = fs.readFileSync(inFilename).toString().split("\n");
+  const totalLines = lines.length;
+  let out = "";
  let i = 0;
  function readLine() {
    if (i < totalLines) {
@ -75,13 +53,7 @@ function preprocess(inFilename, outFilename, defines) {
    typeof outFilename === "function"
      ? outFilename
      : function (line) {
-          if (!line || AllWhitespaceRegexp.test(line)) {
-            const prevLine = out.at(-1);
-            if (!prevLine || AllWhitespaceRegexp.test(prevLine)) {
-              return; // Avoid adding consecutive blank lines.
-            }
-          }
-          out.push(line);
+          out += line + "\n";
        };
  function evaluateCondition(code) {
    if (!code || !code.trim()) {
@ -125,7 +97,7 @@ function preprocess(inFilename, outFilename, defines) {
    }
  }
  function expand(line) {
-    line = line.replaceAll(/__[\w]+__/g, function (variable) {
+    line = line.replace(/__[\w]+__/g, function (variable) {
      variable = variable.substring(2, variable.length - 2);
      if (variable in defines) {
        return defines[variable];
@ -151,7 +123,7 @@ function preprocess(inFilename, outFilename, defines) {
  let state = STATE_NONE;
  const stack = [];
  const control =
-    /^(?:\/\/|\s*\/\*|<!--)\s*#(if|elif|else|endif|expand|include|error)\b(?:\s+(.*?)(?:\*\/|-->)?$)?/;
+    /^(?:\/\/|<!--)\s*#(if|elif|else|endif|expand|include|error)\b(?:\s+(.*?)(?:-->)?$)?/;

  while ((line = readLine()) !== null) {
    ++lineNumber;
@ -204,19 +176,16 @@ function preprocess(inFilename, outFilename, defines) {
          }
          break;
      }
-    } else if (state === STATE_NONE) {
+    } else {
+      if (state === STATE_NONE) {
        writeLine(line);
      } else if (
        (state === STATE_IF_TRUE || state === STATE_ELSE_TRUE) &&
        !stack.includes(STATE_IF_FALSE) &&
        !stack.includes(STATE_ELSE_FALSE)
      ) {
-      writeLine(
-        line
-          .replaceAll(/^\/\/|^<!--/g, "  ")
-          .replaceAll(/(^\s*)\/\*/g, "$1  ")
-          .replaceAll(/\*\/$|-->$/g, "")
-      );
+        writeLine(line.replace(/^\/\/|^<!--/g, "  ").replace(/-->$/g, ""));
+      }
    }
  }
  if (state !== STATE_NONE || stack.length !== 0) {
@ -225,8 +194,105 @@ function preprocess(inFilename, outFilename, defines) {
    );
  }
  if (typeof outFilename !== "function") {
-    fs.writeFileSync(outFilename, out.join("\n"));
+    fs.writeFileSync(outFilename, out);
  }
 }
+exports.preprocess = preprocess;

-export { preprocess };
+function preprocessCSS(mode, source, destination) {
+  function hasPrefixedMozcentral(line) {
+    return /(^|\W)-(ms|o|webkit)-\w/.test(line);
+  }
+
+  function expandImports(content, baseUrl) {
+    return content.replace(
+      /^\s*@import\s+url\(([^)]+)\);\s*$/gm,
+      function (all, url) {
+        const file = path.join(path.dirname(baseUrl), url);
+        const imported = fs.readFileSync(file, "utf8").toString();
+        return expandImports(imported, file);
+      }
+    );
+  }
+
+  function removePrefixed(content, hasPrefixedFilter) {
+    const lines = content.split(/\r?\n/g);
+    let i = 0;
+    while (i < lines.length) {
+      const line = lines[i];
+      if (!hasPrefixedFilter(line)) {
+        i++;
+        continue;
+      }
+      if (/\{\s*$/.test(line)) {
+        let bracketLevel = 1;
+        let j = i + 1;
+        while (j < lines.length && bracketLevel > 0) {
+          const checkBracket = /([{}])\s*$/.exec(lines[j]);
+          if (checkBracket) {
+            if (checkBracket[1] === "{") {
+              bracketLevel++;
+            } else if (!lines[j].includes("{")) {
+              bracketLevel--;
+            }
+          }
+          j++;
+        }
+        lines.splice(i, j - i);
+      } else if (/[};]\s*$/.test(line)) {
+        lines.splice(i, 1);
+      } else {
+        // multiline? skipping until next directive or bracket
+        do {
+          lines.splice(i, 1);
+        } while (
+          i < lines.length &&
+          !/\}\s*$/.test(lines[i]) &&
+          !lines[i].includes(":")
+        );
+        if (i < lines.length && /\S\s*}\s*$/.test(lines[i])) {
+          lines[i] = lines[i].substring(lines[i].indexOf("}"));
+        }
+      }
+      // collapse whitespaces
+      while (lines[i] === "" && lines[i - 1] === "") {
+        lines.splice(i, 1);
+      }
+    }
+    return lines.join("\n");
+  }
+
+  if (!mode) {
+    throw new Error("Invalid CSS preprocessor mode");
+  }
+
+  let content = fs.readFileSync(source, "utf8").toString();
+  content = expandImports(content, source);
+  if (mode === "mozcentral") {
+    content = removePrefixed(content, hasPrefixedMozcentral);
+    // In the mozcentral version the color theme should be based on the Firefox
+    // theme instead of the system theme.
+    content = content.replace(
+      "prefers-color-scheme",
+      "-moz-toolbar-prefers-color-scheme"
+    );
+  }
+  fs.writeFileSync(destination, content);
+}
+exports.preprocessCSS = preprocessCSS;
+
+/**
+ * Merge two defines arrays. Values in the second param will override values in
+ * the first.
+ */
+function merge(defaults, defines) {
+  const ret = Object.create(null);
+  for (const key in defaults) {
+    ret[key] = defaults[key];
+  }
+  for (const key in defines) {
+    ret[key] = defines[key];
+  }
+  return ret;
+}
+exports.merge = merge;
--- a/external/builder/fixtures/css-comment-expected.css
+++ b/external/builder/fixtures/css-comment-expected.css
@ -1,5 +0,0 @@
-/* Comment here... */
-  div {
-    margin: 0;
-    padding: 0;
-  }
--- a/external/builder/fixtures/css-comment.css
+++ b/external/builder/fixtures/css-comment.css
@ -1,7 +0,0 @@
-/* Comment here... */
-/*#if TRUE*/
-/*div {*/
-/*  margin: 0;*/
-  /*padding: 0;*/
-/*}*/
-/*#endif*/
--- a/external/builder/fixtures/if-nested-expected.css
+++ b/external/builder/fixtures/if-nested-expected.css
@ -1,3 +0,0 @@
-div {
-  margin: 0;
-}
--- a/external/builder/fixtures/if-nested.css
+++ b/external/builder/fixtures/if-nested.css
@ -1,14 +0,0 @@
-/*#if TRUE*/
-div {
-  margin: 0;
-  /*#if FALSE*/
-  padding: 0;
-  /*#endif*/
-}
-/*#endif*/
-
-/*#if FALSE*/
-p {
-  margin: 0;
-}
-/*#endif*/
--- a/external/builder/fixtures_esprima/constants-expected.js
+++ b/external/builder/fixtures_esprima/constants-expected.js
@ -10,6 +10,6 @@ var i = true;
 var j = false;
 var k = false;
 var l = true;
-var m = false;
+var m = '1' === true;
 var n = false;
 var o = true;
--- a/external/builder/fixtures_esprima/deadcode-expected.js
+++ b/external/builder/fixtures_esprima/deadcode-expected.js
@ -1,4 +1,5 @@
-function f1() {}
+function f1() {
+}
 function f2() {
 return 1;
 }
@ -9,13 +10,4 @@ function f3() {
 function f4() {
 var i = 0;
 }
-var obj = {
-  method1() {},
-  method2() {}
-};
-class C {
-  method1() {}
-  method2() {}
-}
-var arrow1 = () => {};
-var arrow2 = () => {};
+
--- a/external/builder/fixtures_esprima/deadcode.js
+++ b/external/builder/fixtures_esprima/deadcode.js
@ -23,15 +23,3 @@ function f4() {
  var j = 0;
 }

-var obj = {
-  method1() { return; var i = 0; },
-  method2() { return; },
-};
-
-class C {
-  method1() { return; var i = 0; }
-  method2() { return; }
-}
-
-var arrow1 = () => { return; var i = 0; };
-var arrow2 = () => { return; };
--- a/external/builder/fixtures_esprima/evals-expected.js
+++ b/external/builder/fixtures_esprima/evals-expected.js
@ -3,19 +3,11 @@ var b = true;
 var c = true;
 var d = false;
 var e = true;
-var f = "text";
+var f = 'text';
 var g = {
-  obj: {
-    i: 1
-  },
-  j: 2
-};
-var h = {
-  test: "test"
+ "obj": { "i": 1 },
+ "j": 2
 };
+var h = { 'test': 'test' };
 var i = '0';
-var j = {
-  i: 1
-};
-var k = false;
-var l = true;
+var j = { "i": 1 };
--- a/external/builder/fixtures_esprima/evals.js
+++ b/external/builder/fixtures_esprima/evals.js
@ -8,5 +8,3 @@ var g = PDFJSDev.eval('OBJ');
 var h = PDFJSDev.json('$ROOT/external/builder/fixtures_esprima/evals.json');
 var i = typeof PDFJSDev === 'undefined' ? PDFJSDev.eval('FALSE') : '0';
 var j = typeof PDFJSDev !== 'undefined' ? PDFJSDev.eval('OBJ.obj') : '0';
-var k = !PDFJSDev.test('TRUE');
-var l = !PDFJSDev.test('FALSE');
--- a/external/builder/fixtures_esprima/evals.json
+++ b/external/builder/fixtures_esprima/evals.json
@ -1 +1 @@
-{ "test": "test" }
+{ 'test': 'test' }
--- a/external/builder/fixtures_esprima/ifs-expected.js
+++ b/external/builder/fixtures_esprima/ifs-expected.js
@ -7,12 +7,11 @@ if ('test') {
 {
 "1";
 }
+;
 {
 "2";
 }
+;
 if ('1') {
 "1";
 }
-function f1() {
-  "1";
-}
--- a/external/builder/fixtures_esprima/ifs.js
+++ b/external/builder/fixtures_esprima/ifs.js
@ -23,12 +23,3 @@ if (true && false) {
 if (true && false || '1') {
  "1";
 }
-
-function f1() {
-  if (true) {
-    "1";
-  }
-  if (false) {
-    "2";
-  }
-}
--- a/external/builder/fixtures_esprima/importalias-expected.js
+++ b/external/builder/fixtures_esprima/importalias-expected.js
@ -1,4 +1,7 @@
-import { Test } from "import-name";
+import { Test } from 'import-name';
 import { Test2 } from './non-alias';
-export { Test3 } from "import-name";
-await import( /*webpackIgnore: true*/"./non-alias");
+export {
+ Test3
+} from 'import-name';
+var Imp = require('import-name');
+var Imp2 = require('./non-alias');
--- a/external/builder/fixtures_esprima/importalias.js
+++ b/external/builder/fixtures_esprima/importalias.js
@ -1,4 +1,5 @@
 import { Test } from 'import-alias';
 import { Test2 } from './non-alias';
 export { Test3 } from 'import-alias';
-await __non_webpack_import__("./non-alias");
+var Imp = require('import-alias');
+var Imp2 = require('./non-alias');
--- a/external/builder/preprocessor2.js
+++ b/external/builder/preprocessor2.js
@ -0,0 +1,348 @@
+"use strict";
+
+const acorn = require("acorn");
+const escodegen = require("escodegen");
+const vm = require("vm");
+const fs = require("fs");
+const path = require("path");
+
+const PDFJS_PREPROCESSOR_NAME = "PDFJSDev";
+const ROOT_PREFIX = "$ROOT/";
+const ACORN_ECMA_VERSION = 2021;
+
+function isLiteral(obj, value) {
+  return obj.type === "Literal" && obj.value === value;
+}
+
+function isPDFJSPreprocessor(obj) {
+  return obj.type === "Identifier" && obj.name === PDFJS_PREPROCESSOR_NAME;
+}
+
+function evalWithDefines(code, defines, loc) {
+  if (!code || !code.trim()) {
+    throw new Error("No JavaScript expression given");
+  }
+  return vm.runInNewContext(code, defines, { displayErrors: false });
+}
+
+function handlePreprocessorAction(ctx, actionName, args, loc) {
+  try {
+    let arg;
+    switch (actionName) {
+      case "test":
+        arg = args[0];
+        if (!arg || arg.type !== "Literal" || typeof arg.value !== "string") {
+          throw new Error("No code for testing is given");
+        }
+        const isTrue = !!evalWithDefines(arg.value, ctx.defines);
+        return { type: "Literal", value: isTrue, loc };
+      case "eval":
+        arg = args[0];
+        if (!arg || arg.type !== "Literal" || typeof arg.value !== "string") {
+          throw new Error("No code for eval is given");
+        }
+        const result = evalWithDefines(arg.value, ctx.defines);
+        if (
+          typeof result === "boolean" ||
+          typeof result === "string" ||
+          typeof result === "number"
+        ) {
+          return { type: "Literal", value: result, loc };
+        }
+        if (typeof result === "object") {
+          const parsedObj = acorn.parse("(" + JSON.stringify(result) + ")", {
+            ecmaVersion: ACORN_ECMA_VERSION,
+          });
+          parsedObj.body[0].expression.loc = loc;
+          return parsedObj.body[0].expression;
+        }
+        break;
+      case "json":
+        arg = args[0];
+        if (!arg || arg.type !== "Literal" || typeof arg.value !== "string") {
+          throw new Error("Path to JSON is not provided");
+        }
+        let jsonPath = arg.value;
+        if (jsonPath.indexOf(ROOT_PREFIX) === 0) {
+          jsonPath = path.join(
+            ctx.rootPath,
+            jsonPath.substring(ROOT_PREFIX.length)
+          );
+        }
+        const jsonContent = fs.readFileSync(jsonPath).toString();
+        const parsedJSON = acorn.parse("(" + jsonContent + ")", {
+          ecmaVersion: ACORN_ECMA_VERSION,
+        });
+        parsedJSON.body[0].expression.loc = loc;
+        return parsedJSON.body[0].expression;
+    }
+    throw new Error("Unsupported action");
+  } catch (e) {
+    throw new Error(
+      "Could not process " +
+        PDFJS_PREPROCESSOR_NAME +
+        "." +
+        actionName +
+        " at " +
+        JSON.stringify(loc) +
+        "\n" +
+        e.name +
+        ": " +
+        e.message
+    );
+  }
+}
+
+function postprocessNode(ctx, node) {
+  switch (node.type) {
+    case "ExportNamedDeclaration":
+    case "ImportDeclaration":
+      if (
+        node.source &&
+        node.source.type === "Literal" &&
+        ctx.map &&
+        ctx.map[node.source.value]
+      ) {
+        const newValue = ctx.map[node.source.value];
+        node.source.value = node.source.raw = newValue;
+      }
+      break;
+    case "IfStatement":
+      if (isLiteral(node.test, true)) {
+        // if (true) stmt1; => stmt1
+        return node.consequent;
+      } else if (isLiteral(node.test, false)) {
+        // if (false) stmt1; else stmt2; => stmt2
+        return node.alternate || { type: "EmptyStatement", loc: node.loc };
+      }
+      break;
+    case "ConditionalExpression":
+      if (isLiteral(node.test, true)) {
+        // true ? stmt1 : stmt2 => stmt1
+        return node.consequent;
+      } else if (isLiteral(node.test, false)) {
+        // false ? stmt1 : stmt2 => stmt2
+        return node.alternate;
+      }
+      break;
+    case "UnaryExpression":
+      if (node.operator === "typeof" && isPDFJSPreprocessor(node.argument)) {
+        // typeof PDFJSDev => 'object'
+        return { type: "Literal", value: "object", loc: node.loc };
+      }
+      if (
+        node.operator === "!" &&
+        node.argument.type === "Literal" &&
+        typeof node.argument.value === "boolean"
+      ) {
+        // !true => false,  !false => true
+        return { type: "Literal", value: !node.argument.value, loc: node.loc };
+      }
+      break;
+    case "LogicalExpression":
+      switch (node.operator) {
+        case "&&":
+          if (isLiteral(node.left, true)) {
+            return node.right;
+          }
+          if (isLiteral(node.left, false)) {
+            return node.left;
+          }
+          break;
+        case "||":
+          if (isLiteral(node.left, true)) {
+            return node.left;
+          }
+          if (isLiteral(node.left, false)) {
+            return node.right;
+          }
+          break;
+      }
+      break;
+    case "BinaryExpression":
+      switch (node.operator) {
+        case "==":
+        case "===":
+        case "!=":
+        case "!==":
+          if (
+            node.left.type === "Literal" &&
+            node.right.type === "Literal" &&
+            typeof node.left.value === typeof node.right.value
+          ) {
+            // folding two literals == and != check
+            switch (typeof node.left.value) {
+              case "string":
+              case "boolean":
+              case "number":
+                const equal = node.left.value === node.right.value;
+                return {
+                  type: "Literal",
+                  value: (node.operator[0] === "=") === equal,
+                  loc: node.loc,
+                };
+            }
+          }
+          break;
+      }
+      break;
+    case "CallExpression":
+      if (
+        node.callee.type === "MemberExpression" &&
+        isPDFJSPreprocessor(node.callee.object) &&
+        node.callee.property.type === "Identifier"
+      ) {
+        // PDFJSDev.xxxx(arg1, arg2, ...) => transform
+        const action = node.callee.property.name;
+        return handlePreprocessorAction(ctx, action, node.arguments, node.loc);
+      }
+      // require('string')
+      if (
+        node.callee.type === "Identifier" &&
+        node.callee.name === "require" &&
+        node.arguments.length === 1 &&
+        node.arguments[0].type === "Literal" &&
+        ctx.map &&
+        ctx.map[node.arguments[0].value]
+      ) {
+        const requireName = node.arguments[0];
+        requireName.value = requireName.raw = ctx.map[requireName.value];
+      }
+      break;
+    case "BlockStatement":
+      let subExpressionIndex = 0;
+      while (subExpressionIndex < node.body.length) {
+        switch (node.body[subExpressionIndex].type) {
+          case "EmptyStatement":
+            // Removing empty statements from the blocks.
+            node.body.splice(subExpressionIndex, 1);
+            continue;
+          case "BlockStatement":
+            // Block statements inside a block are moved to the parent one.
+            const subChildren = node.body[subExpressionIndex].body;
+            Array.prototype.splice.apply(
+              node.body,
+              [subExpressionIndex, 1].concat(subChildren)
+            );
+            subExpressionIndex += Math.max(subChildren.length - 1, 0);
+            continue;
+          case "ReturnStatement":
+          case "ThrowStatement":
+            // Removing dead code after return or throw.
+            node.body.splice(
+              subExpressionIndex + 1,
+              node.body.length - subExpressionIndex - 1
+            );
+            break;
+        }
+        subExpressionIndex++;
+      }
+      break;
+    case "FunctionDeclaration":
+    case "FunctionExpression":
+      const block = node.body;
+      if (
+        block.body.length > 0 &&
+        block.body[block.body.length - 1].type === "ReturnStatement" &&
+        !block.body[block.body.length - 1].argument
+      ) {
+        // Function body ends with return without arg -- removing it.
+        block.body.pop();
+      }
+      break;
+  }
+  return node;
+}
+
+function fixComments(ctx, node) {
+  if (!ctx.saveComments) {
+    return;
+  }
+  // Fixes double comments in the escodegen output.
+  delete node.trailingComments;
+  // Removes ESLint and other service comments.
+  if (node.leadingComments) {
+    const CopyrightRegExp = /\bcopyright\b/i;
+    const BlockCommentRegExp = /^\s*(globals|eslint|falls through)\b/;
+    const LineCommentRegExp = /^\s*eslint\b/;
+
+    let i = 0;
+    while (i < node.leadingComments.length) {
+      const type = node.leadingComments[i].type;
+      const value = node.leadingComments[i].value;
+
+      if (ctx.saveComments === "copyright") {
+        // Remove all comments, except Copyright notices and License headers.
+        if (!(type === "Block" && CopyrightRegExp.test(value))) {
+          node.leadingComments.splice(i, 1);
+          continue;
+        }
+      } else if (
+        (type === "Block" && BlockCommentRegExp.test(value)) ||
+        (type === "Line" && LineCommentRegExp.test(value))
+      ) {
+        node.leadingComments.splice(i, 1);
+        continue;
+      }
+      i++;
+    }
+  }
+}
+
+function traverseTree(ctx, node) {
+  // generic node processing
+  for (const i in node) {
+    const child = node[i];
+    if (typeof child === "object" && child !== null && child.type) {
+      const result = traverseTree(ctx, child);
+      if (result !== child) {
+        node[i] = result;
+      }
+    } else if (Array.isArray(child)) {
+      child.forEach(function (childItem, index) {
+        if (
+          typeof childItem === "object" &&
+          childItem !== null &&
+          childItem.type
+        ) {
+          const result = traverseTree(ctx, childItem);
+          if (result !== childItem) {
+            child[index] = result;
+          }
+        }
+      });
+    }
+  }
+
+  node = postprocessNode(ctx, node) || node;
+
+  fixComments(ctx, node);
+  return node;
+}
+
+function preprocessPDFJSCode(ctx, code) {
+  const format = ctx.format || {
+    indent: {
+      style: " ",
+    },
+  };
+  const parseOptions = {
+    ecmaVersion: ACORN_ECMA_VERSION,
+    locations: true,
+    sourceFile: ctx.sourceFile,
+    sourceType: "module",
+  };
+  const codegenOptions = {
+    format,
+    parse(input) {
+      return acorn.parse(input, { ecmaVersion: ACORN_ECMA_VERSION });
+    },
+    sourceMap: ctx.sourceMap,
+    sourceMapWithCode: ctx.sourceMap,
+  };
+  const syntax = acorn.parse(code, parseOptions);
+  traverseTree(ctx, syntax);
+  return escodegen.generate(syntax, codegenOptions);
+}
+
+exports.preprocessPDFJSCode = preprocessPDFJSCode;
--- a/external/builder/test-fixtures.mjs
+++ b/external/builder/test-fixtures.mjs
@ -1,9 +1,8 @@
-import * as builder from "./builder.mjs";
-import { fileURLToPath } from "url";
-import fs from "fs";
-import path from "path";
+"use strict";

-const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const builder = require("./builder.js");
+const fs = require("fs");
+const path = require("path");

 let errors = 0;

@ -22,7 +21,7 @@ files.forEach(function (expectationFilename) {
    .readFileSync(expectationFilename)
    .toString()
    .trim()
-    .replaceAll("__filename", fs.realpathSync(inFilename));
+    .replace(/__filename/g, fs.realpathSync(inFilename));
  const outLines = [];

  const outFilename = function (line) {
@ -37,17 +36,11 @@ files.forEach(function (expectationFilename) {
    builder.preprocess(inFilename, outFilename, defines);
    out = outLines.join("\n").trim();
  } catch (e) {
-    out = ("Error: " + e.message).replaceAll(/^/gm, "//");
+    out = ("Error: " + e.message).replace(/^/gm, "//");
  }
  if (out !== expectation) {
    errors++;

-    // Allow regenerating the expected output using
-    //   OVERWRITE=true node ./external/builder/test-fixtures.mjs
-    if (process.env.OVERWRITE) {
-      fs.writeFileSync(expectationFilename, out + "\n");
-    }
-
    console.log("Assertion failed for " + inFilename);
    console.log("--------------------------------------------------");
    console.log("EXPECTED:");
--- a/external/builder/test-fixtures_esprima.mjs
+++ b/external/builder/test-fixtures_esprima.mjs
@ -1,9 +1,8 @@
-import { fileURLToPath } from "url";
-import fs from "fs";
-import path from "path";
-import { preprocessPDFJSCode } from "./babel-plugin-pdfjs-preprocessor.mjs";
+"use strict";

-const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const p2 = require("./preprocessor2.js");
+const fs = require("fs");
+const path = require("path");

 let errors = 0;

@ -22,7 +21,7 @@ files.forEach(function (expectationFilename) {
    .readFileSync(expectationFilename)
    .toString()
    .trim()
-    .replaceAll("__filename", fs.realpathSync(inFilename));
+    .replace(/__filename/g, fs.realpathSync(inFilename));
  const input = fs.readFileSync(inFilename).toString();

  const defines = {
@ -41,19 +40,13 @@ files.forEach(function (expectationFilename) {
  };
  let out;
  try {
-    out = preprocessPDFJSCode(ctx, input);
+    out = p2.preprocessPDFJSCode(ctx, input);
  } catch (e) {
-    out = ("Error: " + e.message).replaceAll(/^/gm, "//");
+    out = ("Error: " + e.message).replace(/^/gm, "//");
  }
  if (out !== expectation) {
    errors++;

-    // Allow regenerating the expected output using
-    //   OVERWRITE=true node ./external/builder/test-fixtures_esprima.mjs
-    if (process.env.OVERWRITE) {
-      fs.writeFileSync(expectationFilename, out + "\n");
-    }
-
    console.log("Assertion failed for " + inFilename);
    console.log("--------------------------------------------------");
    console.log("EXPECTED:");
--- a/external/cmapscompress/compress.mjs
+++ b/external/cmapscompress/compress.mjs
@ -13,10 +13,10 @@
 * limitations under the License.
 */

-import fs from "fs";
-import { optimizeCMap } from "./optimize.mjs";
-import { parseAdobeCMap } from "./parse.mjs";
-import path from "path";
+const fs = require("fs");
+const path = require("path");
+const parseAdobeCMap = require("./parse.js").parseAdobeCMap;
+const optimizeCMap = require("./optimize.js").optimizeCMap;

 function compressCmap(srcPath, destPath, verify) {
  const content = fs.readFileSync(srcPath).toString();
@ -215,11 +215,11 @@ function parseCMap(binaryData) {
    },
    readHexSigned(size) {
      const num = this.readHexNumber(size);
-      const sign = fromHexDigit(num.at(-1)) & 1 ? 15 : 0;
+      const sign = fromHexDigit(num[num.length - 1]) & 1 ? 15 : 0;
      let c = 0;
      let result = "";
-      for (const digit of num) {
-        c = (c << 4) | fromHexDigit(digit);
+      for (let i = 0; i < num.length; i++) {
+        c = (c << 4) | fromHexDigit(num[i]);
        result += toHexDigit(sign ? (c >> 1) ^ sign : c >> 1);
        c &= 1;
      }
@ -469,7 +469,7 @@ function incHex(a) {
  return s;
 }

-function compressCmaps(src, dest, verify) {
+exports.compressCmaps = function (src, dest, verify) {
  const files = fs.readdirSync(src).filter(function (fn) {
    return !fn.includes("."); // skipping files with the extension
  });
@ -489,6 +489,4 @@ function compressCmaps(src, dest, verify) {
        "%"
    );
  });
-}
-
-export { compressCmaps };
+};
--- a/external/cmapscompress/optimize.mjs
+++ b/external/cmapscompress/optimize.mjs
@ -13,7 +13,7 @@
 * limitations under the License.
 */

-function optimizeCMap(data) {
+exports.optimizeCMap = function (data) {
  let i = 1;
  while (i < data.body.length) {
    if (data.body[i - 1].type === data.body[i].type) {
@ -151,7 +151,10 @@ function optimizeCMap(data) {
      const maxDistance = 100,
        minItems = 10,
        itemsPerBucket = 50;
-      if (subitems.length > minItems && codes.at(-1) - codes[0] > maxDistance) {
+      if (
+        subitems.length > minItems &&
+        codes[codes.length - 1] - codes[0] > maxDistance
+      ) {
        const gapsCount = Math.max(2, (subitems.length / itemsPerBucket) | 0);
        const gaps = [];
        for (let q = 0; q < gapsCount; q++) {
@ -193,20 +196,20 @@ function optimizeCMap(data) {
            i++;
            data.body.splice(i, 0, newItem);
          }
-          for (const subitem of subitems) {
-            const { code } = subitem;
+          for (let j = 0; j < subitems.length; j++) {
+            const code = subitems[j].code;
            let q = 0;
            while (q < groups.length && groups[q] <= code) {
              q++;
            }
-            buckets[q].push(subitem);
+            buckets[q].push(subitems[j]);
          }
        }
      }
    }
    i++;
  }
-}
+};

 function incHex(a) {
  let c = 1,
@ -223,5 +226,3 @@ function incHex(a) {
  }
  return s;
 }
-
-export { optimizeCMap };
--- a/external/cmapscompress/parse.mjs
+++ b/external/cmapscompress/parse.mjs
@ -13,13 +13,13 @@
 * limitations under the License.
 */

-function parseAdobeCMap(content) {
+exports.parseAdobeCMap = function (content) {
  let m = /(\bbegincmap\b[\s\S]*?)\bendcmap\b/.exec(content);
  if (!m) {
    throw new Error("cmap was not found");
  }

-  const body = m[1].replaceAll(/\r\n?/g, "\n");
+  const body = m[1].replace(/\r\n?/g, "\n");
  const result = {
    type: 1,
    wmode: 0,
@ -28,9 +28,9 @@ function parseAdobeCMap(content) {
    usecmap: null,
    body: [],
  };
-  m = /\/CMapType\s+(\d+)\s+def\b/.exec(body);
+  m = /\/CMapType\s+(\d+)+\s+def\b/.exec(body);
  result.type = +m[1];
-  m = /\/WMode\s+(\d+)\s+def\b/.exec(body);
+  m = /\/WMode\s+(\d+)+\s+def\b/.exec(body);
  result.wmode = +m[1];
  m = /\/([\w-]+)\s+usecmap\b/.exec(body);
  if (m) {
@ -100,6 +100,4 @@ function parseAdobeCMap(content) {
  }

  return result;
-}
-
-export { parseAdobeCMap };
+};
--- a/external/dist/README.md
+++ b/external/dist/README.md
@ -7,8 +7,8 @@ parsing and rendering PDFs.
 This is a pre-built version of the PDF.js source code. It is automatically
 generated by the build scripts.

-For usage with older browsers/environments, without native support for the
-latest JavaScript features, please see the `legacy/` folder.
-Please see [this wiki page](https://github.com/mozilla/pdf.js/wiki/Frequently-Asked-Questions#faq-support) for information about supported browsers/environments.
+For usage with older browsers or environments, without support for modern
+features such as e.g. `async`/`await`, `ReadableStream`, optional chaining, and
+nullish coalescing; please see the `legacy` folder.

 See https://github.com/mozilla/pdf.js for learning and contributing.
--- a/Show More
+++ b/Show More