Examine source code of RateIt

{
  "name": "RateIt",
  "version": "1.0.2resigned1",
  "description": "Rate the site.",
  "homepage_url": "https://drg1998.cn/",
  "icons": {
    "48": "icons/icon48.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icons/icon48.png",
    "default_title": "RateIt",
    "default_popup": "popup/popup.html"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{21432239-e49f-49bc-aec2-97b97f831a26}"
    }
  }
}