So far I have tried everything possible, clean reinstall, reboot machine, safe mode, turning off hardware acceleration; issue stands that cursor is in consistent flickering mode and completely vanishes when stopping moving cursor, as if its default state while firefox window is active is to be "visibility:hidden" and tries enfocre it as much as possible when moving; system: windows 10 issue started very recently,. when firefox crashed and crash reporter rebooted browser, as if something went completely broken for specifically firefox deep inside system (yes I also purged all mozilla related stuff from registry when clean reinstalled)