Examine source code of idle

{
  "applications": {},
  "icons": {
    "48": "potatoIcon48.png",
    "96": "potatoIcon96.png",
    "128": "potatoIcon128.png"
  },
  "browser_action": {
    "browser_style": true,
    "default_title": "idle",
    "default_popup": "idle.html",
    "default_icon": {
      "128": "potatoIcon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "description": "simple idle clicker u got nothing to do here",
  "homepage_url": "https://github.com/blurpek",
  "manifest_version": 2,
  "name": "idle",
  "permissions": [
    "storage"
  ],
  "version": "1.3resigned1",
  "browser_specific_settings": {
    "gecko": {
      "id": "{b6a8f060-331a-491b-b414-16f00a935d37}"
    }
  }
}