Examine source code of Tab Groups Unloader

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "version": "2",
  "description": "__MSG_extensionDescription__",
  "author": "Guido Berhoerster",
  "homepage_url": "https://code.guido-berhoerster.org/addons/firefox-addons/tab-groups-unloader/",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "tab-groups-unloader@code.guido-berhoerster.org",
      "strict_min_version": "139.0"
    }
  },
  "icons": {
    "48": "icons/tab-groups-unloader-48.png",
    "96": "icons/tab-groups-unloader-96.png"
  },
  "permissions": [
    "alarms",
    "tabs",
    "tabGroups"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  }
}