Examine source code of TabGroupSync

{
  "manifest_version" : 3 ,
  "name" : "TabGroupSync",
  "version" : "0.3.0.0",
  "description" : "A firefox extension that syncs tabs and tab-groups between devices",
  "icons" : {
    "32" : "icons/32-icon.png",
    "64" : "icons/64-icon.png"
  },
  "permissions" : [
    "tabs" ,
    "tabGroups" ,
    "bookmarks" ,
    "theme" ,
    "storage" 
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "tabgroupsync@lofox.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background" : {
    "scripts" : [
      "background/background.js" 
    ],
    "type" : "module" 
  },
  "action" : {
    "default_title" : "TabGroupSync",
    "default_popup" : "popup/popup.html",
    "default_area": "tabstrip",
    "default_icon" : {
      "32" : "icons/32-icon.png"
    }
  }
}