Still causes LONG restarts on Mac after a crash. It will take anywhere from 10-30 mins for Firefox to load any web page after a crash. I've resorted to deleting it, then reinstalling after my pages load. Even this is tricky, firefox is so slow to load, it's hard to get around the pinwheel to click the icon to remove it. It's been this way for several versions. If I restart ONLY firefox, it does take longer to reload contest, but not as long as after a system crash.

Could be my Mac is too old somehow, iMac "late 2013" on Catalina, last available update for it.

Overall, it's the best I've used hands down, works on most streaming video pages as well, paid or unpaid. Just a shame about the restart issue.