Examine source code of TabTimer - Time Tracker

{
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "short_name": "TabTimer",
  "description": "__MSG_extDescription__",
  "version": "1.3.1",
  "default_locale": "en",
  "homepage_url": "https://www.tandijital.com",
  "icons": {
    "16": "assets/icon-16.png",
    "32": "assets/icon-32.png",
    "48": "assets/icon-48.png",
    "128": "assets/icon-128.png"
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "assets/icon-16.png",
      "32": "assets/icon-32.png",
      "48": "assets/icon-48.png",
      "128": "assets/icon-128.png"
    },
    "default_title": "TabTimer"
  },
  "background": {
    "scripts": [
      "background/service-worker.js"
    ]
  },
  "permissions": [
    "storage",
    "unlimitedStorage",
    "tabs",
    "alarms",
    "notifications",
    "idle"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "tabtimer@tandijital.com",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}