Weird. I've just seen it on some webpages that were opened, but not all and after after launching the browser again they disappeared...
Normally invisible, when I add Google - Clean Dark userstyle for stylish the overlay scrollbar appears.
I've reset the browser with default settings and it seems like it helped. Sorry for the trouble.
I have found the culprit of the situation. The overlay scrollbar doesn't show up when I have enabled staring up Cent Browser where I left off with previously opened tabs.
Normally invisible, when I add Google - Clean Dark userstyle for stylish the overlay scrollbar appears.
I've reset the browser with default settings and it seems like it helped. Sorry for the trouble.
I have found the culprit of the situation. The overlay scrollbar doesn't show up when I have enabled staring up Cent Browser where I left off with previously opened tabs.