Examine source code of LinkNest - Cross-Browser Bookmark Sync

{
  "manifest_version": 2,
  "name": "LinkNest - Cross-Browser Bookmark Sync",
  "version": "3.11",
  "description": "Sync your bookmarks seamlessly across Chrome, Firefox, Edge, Brave & more. Login once, sync everywhere.",
  "permissions": [
    "bookmarks",
    "storage",
    "alarms"
  ],
  "optional_permissions": [
    "https://*/*",
    "http://localhost/*",
    "http://127.0.0.1/*"
  ],
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "shared/client.js",
      "background/modules/core.js",
      "background/modules/sync-engine.js",
      "background/modules/organize-and-messages.js",
      "background/modules/runtime-listeners.js"
    ],
    "persistent": false
  },
  "content_security_policy": "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; connect-src 'self' https: http://localhost:* http://127.0.0.1:*; object-src 'self';",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "linknest@example.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "bookmarksInfo"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  }
}