Examine source code of FolderMark

{
  "manifest_version" : 3 ,
  "name" : "FolderMark",
  "version" : "1.0.0",
  "description" : "One-click bookmark to a folder you choose. Works on any site. Fully configurable.",
  "browser_specific_settings": {
    "gecko": {
      "id": "foldermark@shaheeralimm",
      "strict_min_version": "126.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "permissions" : [
    "activeTab" ,
    "tabs" ,
    "bookmarks" ,
    "contextMenus" ,
    "storage" 
  ],
  "options_page" : "options.html" ,
  "background" : {
    "service_worker" : "background.js" ,
    "scripts" : [
      "background.js" 
    ],
    "type" : "module" 
  },
  "action" : {
    "default_title" : "Bookmark this page",
    "default_icon" : {
      "16" : "icons/icon16.png",
      "48" : "icons/icon48.png",
      "128" : "icons/icon128.png"
    }
  },
  "icons" : {
    "16" : "icons/icon16.png",
    "48" : "icons/icon48.png",
    "128" : "icons/icon128.png"
  }
}