Examine source code of Type Anywhere

{
  "manifest_version": 3,
  "name": "Type Anywhere",
  "version": "1.0.7",
  "description": "Edit text on any website with visual feedback",
  "browser_specific_settings": {
    "gecko": {
      "id": "typeanywhere@alns0.com",
      "strict_min_version": "109.0"
    }
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "storage"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "popup.html"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_end"
    }
  ],
  "action": {
    "default_title": "Type Anywhere",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "commands": {
    "toggle-typing-practice": {
      "suggested_key": {
        "default": "Ctrl+Shift+K",
        "mac": "Command+Shift+K"
      },
      "description": "Toggle typing practice mode"
    }
  }
}