I use https://element.io with the Brave browser on the desktop, and it works very well for me (any Chrome-based browser should be fine). Just follow the links for “Get Element”, “Open in your browser”. There is a way of getting the browser to install Element with a stand-alone launcher so it doesn’t look too much like a web app, but it was ages ago that I set it up, and I can’t remember how I did it now.