Side Mouse Buttons cause the same issue #4
Description
A big issue I and a lot of other people (http://goo.gl/sVj651) have is that the side mouse buttons control back and forward navigation. I use this button for voice communication and it's a real pain in the ass when I'm browsing, the exact same issue you experienced with backspace.
How difficult do you think it would be to prevent these Mouse4 and Mouse5 inputs from navigating the browser, the same way backspace is blocked?