On very long webpages in Firefox, trackpad vertical scroll acceleration cannot be disabled

Forgive me, I'm not very tech savvy, and besides that I'm a Mac user, so basically tech-illiterate, but I'll do my best to describe this. I'm running Firefox (which I keep updated pretty regularly; currently 159.0.1) on a MacBookPro from 2012, currently operating MacOS 10.15.7 (Catalina). I use a trackpad the majority of the time. One finger to move the mouse, two fingers to scroll the page. When scrolling up or down on a very long webpage, the first scroll goes at a steady pace, the second scroll (in the same direction) goes at an identical steady pace, and the third scroll (in the same direction) *rockets* me all the way to the bottom. Or top. Whichever way I'm going. This can be very difficult to work with when trying to reach somewhere in the middle of a long page. Or if I just want to go at a stable, predictable speed. (I don't mind scrolling a few extra times to get through a particularly long page.) I have tried toggling so many settings in the "about:config", turning off acceleration, setting things to zero, but nothing I have tried has been able to turn off the RocketScroll. Would be very appreciative of any suggestions. Please let me know if there is any more information I can provide to solve this issue.