Examine source code of Tab Time Tracker

{
  "manifest_version": 2,
  "name": "Tab Time Tracker",
  "version": "1.0",
  "description": "Track time spent on tabs with categories, nudges, and focus mode for ultimate productivity.",
  "permissions": [
    "tabs",
    "storage",
    "notifications",
    "<all_urls>",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e7a6e463-be2e-4756-957f-57cf296993eb}"
    }
  }
}