Examine source code of Time-on-Page Tracker

{
  "manifest_version": 3,
  "name": "Time-on-Page Tracker",
  "version": "1.0.0",
  "description": "Track how long you spend reading each webpage and export time reports.",
  "action": {
    "default_popup": "popup/popup.html"
  },
  "icons": {
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{943bf644-d84e-4417-96fa-2215a85177c2}",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}