FF's built-in smooth-scrolling features no longer seem to work, so I've returned to this extension, which had gotten unreliable—and now it works! Yay!

The addon is very customizable and works as advertised, but there's one big problem. On websites with lots of autoplay videos, like Reddit for instance, scrolling through will become very laggy and skip around repeatedly, losing all smoothness. This doesn't happen with Firefox's native smooth scrolling or autoscrolling feature. I'm on Linux by the way. Not sure if that's relevant.

Functions great. Only troublesome aspect for me is that if I toggle the extension to 'disabled' in the toolbar icon, it will forget this choice and start 'enabled' the next time I quit and launch Firefox.

I only use the extension on a minority of my systems where my mouse driver has bad scroll configurability, so I'd much rather have to toggle on there than toggle off the majority of times I start the browser.

While I'm being critical of an extension which someone has made and released to absolutely no cost to me, the ability to explicitly type in values in the configuration screen (vs only being able to adjust the sliders) would be a plus as well, in my eyes.

Surprisingly delighted with this extension. My settings for a built-in trackpad in Mid 2012 MackbookPro 15 on Ubuntu 19.10 are:
- Step size: 50
- Smoothness (Forepart): 3.04
- Smoothness: 87.42
- Acceleration Sensitivity: 124
- Acceleration by travel distance: 1.39
It removes the awkwardness on my fingers at the fresh installation. I will still have to adjust a little bit though.

tested 3 scroll-addons. this is the best.
- Very clear and intuitive settings menu.
- All settings have high usage potential.
- The effects of the settings are accurate and absolutely functional.
- Changes can be tested without updating the page.

Poor performance with smoothing while on Linux.

Unlike the Chrome version, this one makes scrolling much worse. It should work out of the box.

When you scroll to the very top. page bounces back. Please add an option to disable this move

Excellent little extension. A go-to for any of my fresh Firefox installations.

Musthave addon on GNU/Linux

The best, It works on Linux and replace Libinput lack feature.

Excellent! Advanced options to customize the mouse wheel sensibility, acceleration, smoothness, speed and even more settings with wide range values. Transformed my mouse wheel behavior in Linux with Gnome from very slow to very fast sensitive! Congratulations to all developers and collaborators! Jorge, from Brasilia, Brazil.