I am running Ubuntu Desktop 19.10 (GNOME 3.34.2) and am having a strange problem with NOD32 126.96.36.199 (64-bit).
I have a Firefox (73.0.1) window open to YouTube TV (streaming a TV program) and after a while (~5 minutes), other Firefox windows will stop browsing. The windows/tabs open just fine but won’t display any content nor can I access any URL.
It doesn’t matter if I disable the ESET protection or not, the behavior is still the same. However, if I remove NOD32, everything works OK. I’ve tested this multiple times by reinstalling NOD32, and each time the problem returns until I uninstall it.
This is a fresh build of Ubuntu 19.10 but I’ve also found this same behavior in Ubuntu 18.04.