Examine source code of TabTime

{
  "manifest_version": 3,
  "name": "Webtime Tracker",
  "version": "1.0.5",
  "description": "Track time spent on websites, manage daily schedules, take notes, and monitor your stock portfolio.",
  "author": "Webtime Tracker Team",
  "permissions": [
    "tabs",
    "storage",
    "alarms",
    "idle",
    "notifications"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "content/overlay.css"
      ],
      "js": [
        "content/overlay.js"
      ]
    }
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "Webtime Tracker",
    "default_icon": {
      "48": "icons/icon-48.png"
    }
  },
  "icons": {
    "48": "icons/icon-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "webtime-tracker@example.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}