Examine source code of Tab Groups Sync & Restore

{
  "manifest_version" : 3 ,
  "name" : "Tab Groups Sync & Restore",
  "version" : "0.1.0",
  "description" : "__MSG_extensionDescription__" ,
  "default_locale" : "en" ,
  "browser_specific_settings": {
    "gecko": {
      "id": "tab-groups-sync-restore@fribbynetwork.net",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "permissions" : [
    "tabs" ,
    "tabGroups" ,
    "storage" ,
    "alarms" ,
    "sessions" ,
    "contextualIdentities" 
  ],
  "optional_permissions" : [],
  "optional_host_permissions" : [
    "https://*/*" ,
    "http://*/*" 
  ],
  "background" : {
    "scripts" : [
      "background/background.js" 
    ],
    "type" : "module" 
  },
  "options_ui" : {
    "page": "options/options.html" ,
    "open_in_tab": true
  },
  "action" : {
    "default_title" : "Tab Groups Sync & Restore",
    "default_popup" : "popup/popup.html",
    "default_icon" : {
      "16" : "icons/icon-16.png",
      "32" : "icons/icon-32.png",
      "48" : "icons/icon-48.png"
    }
  },
  "icons" : {
    "48" : "icons/icon-48.png",
    "96" : "icons/icon-96.png",
    "128" : "icons/icon-128.png"
  }
}