#1009808 firefox-esr: crashes on fresh Debian 11 + xfce install on old PC

Package:
firefox-esr
Source:
firefox-esr
Description:
Mozilla Firefox web browser - Extended Support Release (ESR)
Submitter:
Marek Michalkiewicz
Date:
2022-04-18 11:09:04 UTC
Severity:
normal
#1009808#5
Date:
2022-04-18 11:04:05 UTC
From:
To:
Dear Maintainer,

Fresh install of Debian 11 with XFCE on a very old 32-bit PC
(Athlon XP 2200+, 2 GB RAM) which previously ran Linux Mint 13.
Firefox can't open any web page, crashes as soon as new tab is opened.

https://packages.debian.org/bullseye/firefox-esr says this release
should include Firefox 78, not sure why version 91 was installed by d-i.

After downgrade to 78 it goes a little further but still crashes while
starting a new game against the computer on lichess.org - dmesg shows
lots of "trap invalid opcode" in libxul.so - so I suspect it may be
caused by the CPU too old to support SSE2.  But the 32-bit build was
supposed to work on any P6 or above, right?

Yes I know it's an old computer, but still mostly good enough for
intended very light usage.