Examine source code of Task Scheduler Basic

{
  "manifest_version": 2,
  "name": "Task Scheduler Basic",
  "version": "1.0",
  "description": "This is an application which can store tasks provided by user and classified them as low priority, middle priority, and high priority",
  "permissions": [],
  "browser_action": {
    "default_popup": "game.html",
    "default_icon": {
      "128": "images/task-logo.png"
    }
  },
  "icons": {
    "128": "images/task-logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9a4242ac-4142-472e-8ec9-37a20dca1079}"
    }
  }
}