Examine source code of Auto Bookmark Backup

{
  "manifest_version": 2,
  "name": "Auto Bookmark Backup",
  "version": "1.0",
  "description": "Automatically backup your bookmarks daily or weekly to a JSON file.",
  "permissions": [
    "bookmarks",
    "downloads",
    "alarms",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_title": "Auto Bookmark Backup"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c519a688-491a-4ca9-8bbd-e34c18d12a84}"
    }
  }
}