I use Firefox and have no problems.
Windows 7, old school!
I have had problems with Winoze 7 on my old desktop more related to programs which are no longer compatible.
Firefox still works.
However I currently run a mix of Linux Mint 20. and windoze 8.1 on all my computers.
Mostly dual boot.
Windoze 8.1 is only used for a graphix program, some disk management programs and turbotax
I did keep an old hard drive win7 JIC I need something.
Everything I run works in Linux with a few exceptions.
You can download a bootable disk so you can test it on your machine without installing it.
Research Linux Mint
Dave