SensibleSideButtons 1.0.6 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. This free Mac application was originally developed by Alexei Baboulevitch. SensibleSideButtons for Mac belongs to Internet & Network Tools.
From the developer:
SensibleSideButtons lets you add functional side navigation buttons to your third-party mice in macOS. This tool makes your side buttons behave like bona fide navigation keys. Navigation now works in practically any application with a history, even if there aren't any keyboard shortcuts bound to forward and back. Navigation commands are sent directly to the view under your cursor.
You may want to check out more Mac applications, such as Bookit Dock Menu, SafariCookieCutter or AutoAnswer, which might be related to SensibleSideButtons.