My laptop took an update on 2/8/22 and my Firefox stopped working. The toolbars showed up, but nothing in the main window and most sites wouldn't open. I uninstalled and reinstalled. It would work correctly for a couple of sites, but would just stop working. Only the toolbars (bookmarks and search) were on the screen. I removed the app data for Mozilla and uninstalled and re-installed again. It again worked normally, but only for a few minutes. Just toolbars and a white main window. My laptop was running Windows 10 when this happened. I went ahead and installed Windows 11 and did another re-install. Same thing. It worked for a short time and then quit. It doesn't seem to matter if I sign in and sync or not. I hope there's a fix for this. I love my Firefox! I'm using a different computer to send this. It is a Windows 10 machine that has the same update, and Firefox is working fine on this machine.