[Kururin]

Thanks @tryp4vps  I think my problem has been solved.  I didn't do it with the about:config.  When I Googled how to edit the mouse scrolling with the about:config I came across a support forum that provided the answer for me.  What worked for me (so far) was to disable hardware acceleration in my Firefox Browser - so will do it with my Google Browser as well.  Google is of course going to be annoying as one can't make the option last unless you sign in with Google every time.

Hardware acceleration is a problematic setting. It actually slows down everything and causes problem like your. Glad you got it solved. I always keep it turned off