Examine source code of Browser Reloader

{
  "name": "Browser Reloader",
  "description": "This is browser reloader for nodejs developer",
  "version": "0.1.0",
  "manifest_version": 2,
  "icons": {
    "16": "img/icon16.png",
    "32": "img/icon32.png",
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "./socket.io.js",
      "./background.js"
    ]
  },
  "permissions": [
    "tabs",
    "storage",
    "http://*/*",
    "https://*/*",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d4b22f42-f7d0-4928-9117-0db7ccf6255b}"
    }
  }
}