For PWAs, you can "install" the app to your machine / phone which gives it its own icon and launches it in its own window. This also allows it to override most default shortcuts (Cmd/Ctrl+W, Cmd/Ctrl+T etc.) I use this with https://github.com/coder/code-server on my personal server and it's a way better experience for me than mucking around with SSH / SFTP plugins.
