Examine source code of Hindi Keyboard

{
  "name": "Hindi Keyboard",
  "description": "Hindi Keyboard- Type Hindi Words Without Installing Hindi-Keyboard On Your Computer.",
  "version": "1.1",
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "sanjay.mosfet@gmail.com"
    }
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "keyboard.html"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "http://*/*",
    "https://*/*",
    "storage",
    "cookies"
  ]
}