Examine source code of Dzejowcy Notifier

{
  "manifest_version": 2,
  "name": "Dzejowcy Notifier",
  "version": "0.4.3",
  "description": "Extension that notifies users about streams and news from \"Dzejowcy\" community.",
  "icons": {
    "48": "icon.png"
  },
  "background": {
    "scripts": [
      "content.js"
    ]
  },
  "permissions": [
    "notifications",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Dzejowcy Notifier",
    "default_popup": "popup.html"
  }
}