I'm updating my review (January 2025) to say that it works great with VS Code. For advanced PHP development, you need to launch your server (like WampServer, XAMPP, etc.) and also start the Live Server from VS Code.

In the extension's window, fill the first field with your local project URL. The second field is the URL of Live Server, which uses port 5500 by default.

This extension is a must-have, thx!

Great addons but it seems not working on Firefox Quantum yet