Examine source code of Typing Speed Test: Typing Globe

{
  "manifest_version": 3,
  "name": "Typing Speed Test : by Typing Globe",
  "version": "1.1.0",
  "description": "Test typing speed, WPM, and accuracy instantly. Live tracking widget for Google Docs, Word, and web pages with customizable timers.",
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "contextMenus",
    "storage",
    "alarms",
    "notifications",
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_end",
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "omnibox": {
    "keyword": "globe"
  },
  "icons": {
    "16": "icon.png",
    "48": "icon.png",
    "128": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "typing-globe-addon@typingglobe.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}