SensibleSideButtons Alternatives
SensibleSideButtons is described as 'If you use third-party mice with your Mac, you've surely noticed just how useless the side buttons are. By default, they act as a sort of crippled middle click, consigned to opening new links out from under you when you least expect it' and is an app in the os & utilities category. There are three alternatives to SensibleSideButtons for Mac. The best alternative is SteerMouse. It's not free, so if you're looking for a free alternative, you could try Mac Mouse Fix.
SteerMouse is a utility that lets you freely customize buttons, wheels and cursor speed. Both USB and Bluetooth mice are supported.
Switch between Spaces, use Windows-style Back and Forward, and more - right from your mouse. Also features a refined Smooth-Scrolling algorithm that strikes a perfect balance between fluidity and control.
Smooze animates your scroll and adds functionality to your non-Apple mouse (scroll-wheel mouse).