Install firefox-esr in Whonix 14 results in Firefox taking over as the default browser. So which clicking links from other apps, they will open in firefox, and not torbrowser.
At least, that was my experience.
I installed firefox-esr because I needed to reach a clearnet site from a non-tor node. So I started the bitmask VPN client, and then used firefox to get to the site. This was done to avoid adjusting any of the torbrowser settings.
@StuPiD123 I believe there is an AppImage of Firefox. I am not sure what version they are on, but it might be of interest to you, if you know what you are doing and definitely don’t want torbrowser for some reason. But you should probably be using TorBrowser, and not firefox if you’re unsure.