Examine source code of RightClickRestorer

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "111.0",
  "icons": {
    "48": "icons/48.png",
    "64": "icons/64.png"
  },
  "permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "restorer.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_action": {
    "default_title": "__MSG_actionTitle__",
    "default_icon": "icons/64.png"
  },
  "applications": {
    "gecko": {
      "id": "{070cee15-14b5-4c46-b953-aff736238a2e}",
      "strict_min_version": "68.0"
    }
  },
  "default_locale": "en"
}