Am Freitag, dem 31.12.2021 um 20:53 +0100 schrieb Markus Koschany: > If you install version 1.40.2+dfsg-1 from unstable, does this resolve > your problem? I have noticed similar issues with Firefox on websites > which make heavy use of Javascript but I don't experience them with > Chromium.
Unfortunately no, 1.40.2+dfsg-1 from unstable does not fix the problem. However, the same version from Firefox Add-ons is fine, no 100% CPU. I also found this Debian bug report against firefox: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=986027 And this upstream Firefox bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1706594
