Examine source code of Habit Alarm

{
  "manifest_version": 2,
  "name": "Habit Alarm",
  "version": "1.0.0.6resigned1",
  "description": "Do productive tasks in exchange for more browsing time!",
  "icons": {
    "48": "icons/border-48.png"
  },
  "applications": {
    "gecko": {
      "id": "addon@habitalarm.com"
    }
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/border-48.png"
    },
    "default_title": "Habit Alarm",
    "default_popup": "popup/popup.html"
  },
  "permissions": [
    "<all_urls>",
    "activeTab",
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}