Examine source code of To Do List

{
  "name": "To Do List",
  "version": "0.0.1",
  "manifest_version": 2,
  "description": "Simple and attractive To-Do-List helps to improve your productivity and also provide some basic informations.",
  "browser_action": {
    "default_popup": "index.html"
  },
  "icons": {
    "128": "TICK.png"
  },
  "permissions": [
    "activeTab"
  ]
}