Examine source code of Google Analytics Debugger

{
  "browser_action": {
    "default_icon": "icon-off.png",
    "default_title": "GA Debug: OFF"
  },
  "description": "Prints useful information to the JavaScript console by enabling the debug version of the Google Analytics Javascript.",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "name": "Google Analytics Debugger",
  "permissions": [
    "http://*/*",
    "https://*/*",
    "webRequest",
    "webRequestBlocking",
    "tabs"
  ],
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "manifest_version": 2,
  "version": "2.8.2"
}