Examine source code of OzBargain Notifier

{
  "manifest_version": 2,
  "name": "OzBargain Notifier",
  "version": "1.3.4",
  "description": "Sends a push notification when there's a bargain you're interested in",
  "homepage_url": "https://github.com/Shwuup/bargain-notifier-extension",
  "icons": {
    "48": "icons/icons8-o-48.png"
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "icons/icons8-o-16.png",
      "32": "icons/icons8-o-32.png"
    },
    "default_title": "OzBargain Notifier",
    "default_popup": "popup/itemsofinterest.html"
  },
  "background": {
    "scripts": [
      "bargain-notifier.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "permissions": [
    "notifications",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@ozbargain-notifier"
    }
  }
}