Examine source code of PersistentPin

{
  "description": "__MSG_extensionDescription__",
  "manifest_version": 2,
  "name": "PersistentPin",
  "version": "1.2.1",
  "homepage_url": "https://github.com/Faerbit/persistentpin-webextension",
  "options_ui": {
    "page": "src/options.html"
  },
  "background": {
    "page": "src/background.html"
  },
  "permissions": [
    "storage",
    "tabs",
    "contextMenus"
  ],
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{b8f5b973-7a28-4787-8e94-fdb7504e3991}",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}