Examine source code of Advice Me

{
  "manifest_version": 2,
  "name": "Advice me",
  "description": "Millions of free advices every time you click",
  "version": "1.0.3",
  "icons": {
    "32": "favicon.png",
    "64": "logo.png",
    "128": "logo.png"
  },
  "background": {
    "persistent": true,
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "logo.png",
    "default_popup": "popup.html"
  }
}