You don't need a browser to sandbox a program. I personally sandbox Zoom (which I'm required to use for classes) in a Bubblewrap sandbox and seccomp filter. Thi

You don't need a browser to sandbox a program. I personally sandbox Zoom (which I'm required to use for classes) in a Bubblewrap sandbox and seccomp filter. This offers sandboxing capabilities unavailable in the browser, such as W^X enforcement and resource restrictions (CPU and bandwidth limits). For other programs (not Zoom), I can (and do) also completely block off network access.