Examine source code of Bookmark Boost

{
  "browser_specific_settings": {
    "gecko": {
      "id": "umaisjuttkhan@example.com"
    }
  },
  "manifest_version" : 3 ,
  "name" : "Bookmark Boost",
  "version" : "1.0",
  "description" : "Bookmark Boost the Firefox bookmarks API to search through, add and remove bookmarks from the user's bookmark tree.",
  "action" : {
    "default_popup" : "popup.html",
    "default_icon" : "icon.png"
  },
  "permissions" : [
    "bookmarks" 
  ]
}