Examine source code of ZenReaderFx

{
  "manifest_version": 3,
  "name": "ZenReader",
  "version": "3.0.2",
  "description": "Distraction-free article reader with syntax highlighting, PDF bookmarks, and custom fonts",
  "permissions": [
    "activeTab",
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "extract-article": {
      "suggested_key": {
        "default": "Ctrl+Shift+Z"
      },
      "description": "Extract article into ZenReader"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "reader.html",
        "reader/*",
        "css/*",
        "lib/*",
        "fonts/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; img-src 'self' data: blob: https: http:"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "zen-reader@balaji-ch.dev",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}