Examine source code of ProxyBar

{
  "manifest_version": 2,
  "name": "ProxyBar",
  "version": "0.1",
  "author": "Alexander Gushchin",
  "permissions": [
    "proxy",
    "storage"
  ],
  "sidebar_action": {
    "default_icon": {
      "16": "button/image-16.png",
      "32": "button/image-32.png"
    },
    "default_title": "ProxyBar",
    "default_panel": "proxy_sidebar.html",
    "browser_style": true
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "button/image-16.png",
      "32": "button/image-32.png"
    },
    "default_title": "Open ProxyBar",
    "default_area": "navbar"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}