pdf.js/extensions/chromium/preferences_schema.json

{
  "type": "object",
  "properties": {
    "showPreviousViewOnLoad": {
      "title": "Show previous position of PDF upon load",
      "description": "Whether to view PDF documents in the last page and position upon opening the viewer.",
      "type": "boolean",
      "default": true
    },
    "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.",
      "type": "string",
      "pattern": "|auto|page-actual|page-width|page-height|page-fit|[0-9]+\\.?[0-9]*(,[0-9]+\\.?[0-9]*){0,2}",
      "default": ""
    },
    "sidebarViewOnLoad": {
      "title": "Sidebar state on load",
      "description": "Controls the state of the sidebar upon load.\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": [
        0,
        1,
        2,
        3
      ],
      "default": 0
    },
    "enableHandToolOnLoad": {
      "title": "Activate Hand tool by default",
      "description": "Whether to activate the hand tool by default.",
      "type": "boolean",
      "default": false
    },
    "enableWebGL": {
      "title": "Enable WebGL",
      "description": "Whether to enable WebGL.",
      "type": "boolean",
      "default": false
    },
    "pdfBugEnabled": {
      "title": "Enable debugging tools",
      "description": "Whether to enable debugging tools.",
      "type": "boolean",
      "default": false
    },
    "disableRange": {
      "title": "Disable range requests",
      "description": "Whether to disable range requests (not recommended).",
      "type": "boolean",
      "default": false
    },
    "disableStream": {
      "title": "Disable streaming for requests",
      "description": "Whether to disable streaming for requests (not recommended).",
      "type": "boolean",
      "default": false
    },
    "disableAutoFetch": {
      "type": "boolean",
      "default": false
    },
    "disableFontFace": {
      "title": "Disable @font-face",
      "description": "Whether to disable @font-face and fall back to canvas rendering (this is more resource-intensive).",
      "type": "boolean",
      "default": false
    },
    "disableTextLayer": {
      "title": "Disable text selection layer",
      "description": "Whether to disable the text selection layer.",
      "type": "boolean",
      "default": false
    },
    "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
      ],
      "default": 0
    }
  }
}