Examine source code of Simple Tab Groups

{
  "manifest_version": 2,
  "name": "Simple Tab Groups MV2",
  "version": "1.0",
  "description": "A minimal AMO‑safe Simple Tab Groups style extension (MV2).",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Simple Tab Groups",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "simple-tab-groups@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "tabs",
    "activeTab",
    "storage"
  ]
}