I have absolutely no clue why this started happening. This mouse has been great to me, save the occasional hair under the lens. Today, up and for no reason, the middle mouse button has stopped functioning properly. At first, I figured it was busted or Firefox's fault. As I've come to play with it more, I've noticed it's just taking an lot of pressure to make the click register. I hear the usual click with the normal amount, but the computer fails to register unless I really drive my finger into it.
Is there any reason for this happening, and could it be with the computer instead of physical?
Quick update: It's seemingly random now, after fuckin' with it more and unplug-replugging it.