Examine source code of Relay – Encrypted Bookmark Sync

{
  "manifest_version": 3,
  "name": "Relay – Encrypted Bookmark Sync",
  "short_name": "Relay",
  "version": "2.5.0",
  "description": "End-to-end encrypted bookmark sync between Firefox and Chromium browsers, plus account-free encrypted collection sharing.",
  "permissions": [
    "bookmarks",
    "storage",
    "alarms"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Relay",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "config.js",
      "api.js",
      "crypto.js",
      "bookmark-adapter.js",
      "sync.js",
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'; connect-src 'self' https://mgeiplftbehngfsqtbiq.supabase.co"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "relay@relayextension.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "bookmarksInfo"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  }
}