This actually applies to any peripheral, but I absolutely hate anything that causes my browser to move forward or back a page that is not moving the pointer over to the forward/back buttons in the browser bar and clicking. Delete on the keyboard, mouse buttons 4 and 5. I use these for other things, and having the browser pages when I use them is disconcerting at best, and harmful if I had content in that page that disappeared.
I think I figured out how to disable it for the keyboard, but cannot do so for the mouse without turning off the buttons entirely. I'm using a Logitech LX8, and have tried using setpoint to change this, but it seems to do nothing. Does anyone know a way to solve this, so that hitting these buttons will never ever change my browser page, but they still work just fine in any games?