Examine source code of Google Search UI Chooser

{
  "manifest_version": 2,
  "name": "Google Search UI Chooser",
  "author": "tech234a",
  "version": "0.4.1",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "https://images.google.com/*",
    "https://www.google.com/*",
    "storage"
  ],
  "background": {
    "scripts": [
      "b.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  }
}