Examine source code of Referrer policy

{
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "developer": {
    "name": "Janghou"
  },
  "manifest_version": 2,
  "version": "1.36",
  "default_locale": "en",
  "icons": {
    "64": "icon.svg",
    "128": "icon.svg"
  },
  "permissions": [
    "storage",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "default_settings.js",
      "background.js"
    ]
  },
  "options_ui": {
    "page": "pages/options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4934dbd8-17e0-4b24-b47c-df49a433fe2b}"
    },
    "gecko_android": {}
  }
}