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}"
    }
  }
}