Examine source code of Indian Hackbar

{
  "manifest_version" : 2 ,
  "name" : "Indian Hackbar",
  "version" : "1.0.1",
  "description" : "Hackbar handy port tool for the new WebExtensions API to work with new Firefox. benificial for webdevelopers ",
  "icons" : {
    "48" : "icons/icon.png"
  },
  "devtools_page": "devtools/devtools.html",
  "background" : {
    "scripts" : [
      "background.js" 
    ]
  },
  "permissions" : [
    "<all_urls>" ,
    "activeTab" ,
    "webRequest" ,
    "webRequestBlocking" 
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2c26924e-1fc4-4eed-8a02-c4c969964ee6}"
    }
  }
}