You want webtop: docs.linuxserver.io/images/docker-webtop

But just like with kasm, not all software will work, although I think most will.

About kasm:

Not really. I don’t thing the default kasm images come with sudo or a root password, so you cant “sudo apt” or the like.

If you do create a software image with sudo, them yes, but only for a single session, if you keep it long running. Every time you destroy the session completely it will be reset.

Although, If you need software in your images, it’s better to just build your own docker images for use with kasm, that have everything you want.