PLEASE stop doing this thing where you hide the scroll bar when it's not being used, or make it invisible, or super thin and difficult to see. this post explains why. as an example of this...
to disable it on websites (firefox)
download custom scrollbars by wesley branton and adjust the settings to your liking.
to disable it in the operating system (on linux)
every gtk app does this stupid ableist nonsense. gtk refers to it as "overlay scrollbars", it's been the default ever since the "ruin every gui with 'minimalism' and 'flat design'" craze of the 2010's, and it's very difficult to turn it off.
if you are very lucky, your desktop environment might provide some kind of way to disable it, probably buried deep in some settings menu, but i was not so lucky and the way i made my computer usable was by
- editing
/etc/environmentas root - adding the following on its own line:
GTK_OVERLAY_SCROLLING=0
thank you to this linux mint forum thread for providing this solution