Examine source code of Librewolf Update Notifier

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "1.1.1",
  "description": "__MSG_extensionDescription__",
  "browser_specific_settings": {
    "gecko": {
      "id": "{2ac35ed7-d42f-459e-9c34-edeef25dec08}",
      "strict_min_version": "115.0"
    }
  },
  "icons": {
    "16": "notification/images/ok-icon.svg",
    "24": "notification/images/ok-icon.svg",
    "32": "notification/images/ok-icon.svg",
    "48": "notification/images/ok-icon.svg",
    "64": "notification/images/ok-icon.svg",
    "96": "notification/images/ok-icon.svg",
    "128": "notification/images/ok-icon.svg"
  },
  "background": {
    "scripts": [
      "versionchecker.js",
      "background.js",
      "updatealarm.js"
    ],
    "persistent": false
  },
  "browser_action": {},
  "permissions": [
    "storage",
    "menus",
    "notifications",
    "alarms"
  ],
  "options_ui": {
    "page": "options/options.html"
  },
  "default_locale": "en"
}