Wow surprisingly good on Ubuntu-MATE 19.10/ FireFox 73.0
I am already addicted. Also with the default setting it does NOT remove the paste with the wheel (I was scare about that so it was the first thing I did tried, and got very happy), Excellent!
I like also your humor in the setting page (1000 grams, it's funny;) )

Very nice add-on, thanks-thanks a lot!

Works like a charm! Beats the hell out of using the mousewheel.

Nicely implemented. It is however kinda annoying from time to time since just the slightest movement prevents the default button action from firing. I really wish there is a minimum drag threshold option, otherwise right click doesn't fire if moved slightly, or double clicking when it comes to the middle button.

I love this extension, it's very well done ( extensively tried in Linux & Windows10 ). And it doesn't pilfer my private data.