diff --git a/web/app.js b/web/app.js
index 8261040c0..45cd34cec 100644
--- a/web/app.js
+++ b/web/app.js
@@ -229,7 +229,11 @@ const PDFViewerApplication = {
    * @private
    */
   async _readPreferences() {
-    if (AppOptions.get("disablePreferences") === true) {
+    if (
+      (typeof PDFJSDev === "undefined" ||
+        PDFJSDev.test("!PRODUCTION || GENERIC")) &&
+      AppOptions.get("disablePreferences")
+    ) {
       // Give custom implementations of the default viewer a simpler way to
       // opt-out of having the `Preferences` override existing `AppOptions`.
       return;
@@ -328,9 +332,11 @@ const PDFViewerApplication = {
    * @private
    */
   async _initializeL10n() {
-    this.l10n = this.externalServices.createL10n({
-      locale: AppOptions.get("locale"),
-    });
+    this.l10n = this.externalServices.createL10n(
+      typeof PDFJSDev === "undefined" || PDFJSDev.test("!PRODUCTION || GENERIC")
+        ? { locale: AppOptions.get("locale") }
+        : null
+    );
     const dir = await this.l10n.getDirection();
     document.getElementsByTagName("html")[0].dir = dir;
   },
diff --git a/web/app_options.js b/web/app_options.js
index 66c478739..f3ac76d8a 100644
--- a/web/app_options.js
+++ b/web/app_options.js
@@ -53,14 +53,14 @@ const defaultOptions = {
     value: false,
     kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
   },
+  /**
+   * The `disablePreferences` is, conditionally, defined below.
+   */
   enablePermissions: {
     /** @type {boolean} */
     value: false,
     kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
   },
-  /**
-   * The `disablePreferences` is, conditionally, defined below.
-   */
   enablePrintAutoRotate: {
     /** @type {boolean} */
     value: false,
@@ -110,9 +110,11 @@ const defaultOptions = {
     value: false,
     kind: OptionKind.VIEWER + OptionKind.PREFERENCE,
   },
-  /**
-   * The `printResolution` is, conditionally, defined below.
-   */
+  printResolution: {
+    /** @type {number} */
+    value: 150,
+    kind: OptionKind.VIEWER,
+  },
   renderer: {
     /** @type {string} */
     value: "canvas",
@@ -252,11 +254,6 @@ if (
     value: typeof navigator !== "undefined" ? navigator.language : "en-US",
     kind: OptionKind.VIEWER,
   };
-  defaultOptions.printResolution = {
-    /** @type {number} */
-    value: 150,
-    kind: OptionKind.VIEWER,
-  };
 }
 
 const userOptions = Object.create(null);