SensibleSideButtons lets your mouse side-buttons behave as navigation keys. Navigation works in almost any application that has a history. Navigation commands are sent directly from your cursor to the view below it, which can help to eliminate mistakes and even allow multiple navigable sections to be controlled independently. There is no blinking menu bar, annoying noises, or fear of keyboard shortcuts interfering with your workflow. The best part is that the code is native, clean and very simple. We are simply reviving some parts of macOS that have been forgotten.