Fóram Tacaíochta Firefox

I use Firefox on Linux Debian 11 (Bullseye). After a recent automatic update to Firefox 91.10.0esr, some websites will not load (just sit with a blank page, showing flicking loading symbol). Examples are ocado.com and abelandcole.co.uk. I have tried all the usual things to fix, including, switching off VPN, clearing cookies and caches, running in safe mode, all with no success. Both sites run fine in Vivaldi and Brave. I have eventually got the pages to load by disabling IPv6 in Firefox. Clearly there is a problem with 91.10.0esr. I'm not sure whether the workaround of disabling IPv6 might cause other problems or weaken security or privacy?

I need some things to look at. Debian 11.4 Bullseye 16 CPU 72GB I just got the Mate desktop working. Thought I'd find a cool wallpaper. Site said it needed to load an extension. I tried to escape but now my firefox fails to load even in troubleshoot mode. It builds the window frame I can almost touch the menu and gone.

Checked .mozilla/firefox/Crash Reports/ and it's empty checked .mozilla/extensions/ and it's emtpy Got an install time InstallTime20220718130424

as I click on Firefox Icon in menu the screen pops alert that says: "Firefox closed unexpectedly while starting....try to resolve the problem in troubleshooting in SafeMode."

tailing syslog: tail -f /var/log/syslog gives this clue: oom-kill:constraint=CONTRAINT_NONE, task=firefox-esr total-vm:672432kb Kernel Out Of Memory killed process pgtables:840kb oom-score_addj:0

I can add more detail if I know where to look. OOM with 72GB ?