Firefox 89 on my Pi 4 is displaying bad codec symptoms, videos can be watched but the picture is corrupted by brightly coloured patches around areas of detail.
On the Pi I am running Ubuntu 21.04 and I am very pleased with it.
My preferred browser is Firefox which has been working well until the upgrade to version 89. By way of a check, I did the same Firefox 89 upgrade on a PC which is also running Ubuntu. On the PC Firefox still works perfectly.
Am I alone in this or have others seen the same issue ?
Assuming I am not alone, does anybody have any idea what has gone wrong ?