F-Secure Internet Security 18.2 fully breaks page youtube.com and allegro.pl
As in the topic - breaks css and other scripts on youtube.com and allegro.pl in firefox 96.0.3 on W10 19044.1466.
Can't do anything about it, disabling firefox addon makes even more troubles. Enabling it and adding page to whitelist solved problem for youtube but didn't for allegro. Even full addon removal didn't work. The only working solution is to fully disable f-secure.
This is a vulnerability.