Examine source code of Linkedin ad hunter

{
  "manifest_version": 2,
  "name": "Linkedin ad hunter",
  "description": "Blocking ads in linkedin for free.",
  "version": "0.0.1",
  "author": "LightCodes LLC",
  "browser_action": {
    "default_title": "Linkedin ad hunter"
  },
  "permissions": [
    "tabs",
    "webNavigation",
    "https://www.linkedin.com/"
  ],
  "background": {
    "scripts": [
      "extension.js"
    ]
  }
}