Examine source code of Tab Group Syncer

{
  "manifest_version": 3,
  "name": "Tab Group Syncer",
  "version": "1.5.1",
  "description": "Syncs firefox tab groups across devices. Requires 'extensions.tabGroups.enabled' to be activated in about:config. Will maintain it for myself until official groups sync is supported by Firefox.",
  "author": "Sudhir Babu Nakka",
  "homepage_url": "https://github.com/sudhir-asuracore/firefox-tab-group-sync",
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "support@sudhirnakka.com",
      "strict_min_version": "120.0"
    }
  },
  "permissions": [
    "tabs",
    "tabGroups",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_title": "Tab Group Syncer",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png"
    }
  }
}