Examine source code of Website Time Tracker

{
  "manifest_version": 2,
  "name": "Website Time Tracker",
  "version": "1.0.0",
  "description": "Tracks and ranks time spent on different websites",
  "permissions": [
    "tabs",
    "storage",
    "webNavigation",
    "alarms"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.svg"
  },
  "icons": {
    "32": "icon.svg",
    "64": "icon.svg",
    "128": "icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2c80e5cd-3ff8-43f0-99df-c878f6f4bc47}"
    }
  }
}