I am running Firefox 94.0 in a couple of Linux Mint systems. My main desktop computer, with a 3.8 GHz 6-core AMD Ryzen 5 processor on an MSI B450-A PRO MAX MB with 16 GB RAM, has had Linux Mint 19.3 installed for over a year. Just today, Firefox, which has also been installed in this OS for a long time, exhibited extreme slowness. I did an online search, and found that the slowness was cured by using the Troubleshoot Mode, but none of the suggestions I found solved the problem in normal mode. So, I went into Settings and turned off hardware acceleration. That solved the problem, somewhat ironically. The hardware acceleration seemed to accomplish deceleration instead. So my browser works, but there is something wrong with hardware acceleration in Firefox. On a new install of Linux Mint 20.04, I recently experienced frequent crashing of Firefox just after clicking on a link. I tried online solutions, which didn't help, but then I turned off - - guess what - - hardware acceleration, and no more crashes. That is what motivated me to turn off hardware acceleration in Firefox on my Linux Mint 19.3 machine today. I don't really have a problem to solve, but I don't know of a better place to submit a bug report, so I am hoping you will pass this on to the developers.