I tried to use LibreWolf yesterday. The Flatpak version wasn't supported by KeePassXC, so that was a pass for me. The Fedora version did work with it, but it was also freezing my system and causing graphical glitches that were so terrible, I thought my hardware died. There were coloured blocks as well as weird pixelated warping. It's probably because I have Wayland, and I noticed that the Fedora version ran under X. I would have submitted a bug report, but I didn't even know where to start. Maybe I'll do that eventually.

E: I have narrowed this down with journalctl to be an issue with amdgpu. This happenes on Firefox as well, but not other applications somehow. It's something to do with a gfxhub page fault. I'll have to see whether an older kernel version might help.