Examine source code of LibreBookmarkSync

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "0.1.0",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "default_locale": "en",
  "permissions": [
    "storage",
    "bookmarks",
    "notifications",
    "alarms"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "libre-bookmark-sync@ktfax821.cn",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "bookmarksInfo"
        ],
        "optional": []
      }
    }
  },
  "optional_permissions": [
    "https://api.github.com/*",
    "https://gist.githubusercontent.com/*",
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": false,
    "browser_style": false,
    "page": "options.html"
  }
}