Examine source code of ToggleMark

{
  "manifest_version": 2,
  "name": "Quick Bookmark Toggler",
  "version": "1.0",
  "description": "Toggle bookmark for the current page using a toolbar button.",
  "icons": {
    "48": "icons/unbookmarked.svg",
    "96": "icons/bookmarked.svg"
  },
  "permissions": [
    "bookmarks",
    "tabs",
    "notifications"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Add Bookmark",
    "default_icon": {
      "48": "icons/unbookmarked.svg"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "quick-bookmark-toggler@sahil.dev",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}