fastwheel by Firefox user 14313392

Source code can found at https://github.com/hueyjj/fastwheel

This extension's functionality will work on most site. But there are many sites that it will not work on. This extension is meant to be simple, and works if it works kind of effort.

Shortcuts:
Back (browser) Press and hold middle mouse button and release in left direction
Forward (browser) Press and hold middle mouse button and release in right direction
Scroll to top (page) Press and hold middle mouse button and release in up direction
Scroll to bottom (page) Press and hold middle mouse button and release in down direction