Firefox is acting as if it is receiving the "scroll up' signal from the mouse wheel continually - even when the mouse is turned off, and not inside actual web pages. I can scroll up and down inside the page normally. However, if I mouse over the tabs, they continually scroll: if I hold down ctrl, it zooms without any other input: I can't use my search bar, because it acts like I'm scrolling and closes the 'do your search' bit. I have run Firefox in troubleshooting mode, same result. I have refreshed Firefox, no change. I have verified the mouse drivers. I've poked at the options. I am out of ideas! Windows 7, version 88.01 (64bit)