Anyone had problems with left mouse button failing to work when using Firefox and/or Chrome? This occurs frequently on Youtube where it is often difficult to change the volume or pause a video. It also becomes impossible to scroll forward or back through similar videos after the one you were watching finished playing. If I keep at it enough times it will eventually work, but it can take 10 or more attempts. The problem occurs whether using the "button" in lower left corner of touchpad or tapping center of pad. The behavior occurs on other websites too, where it requires repeated attempts to follow a link. I've searched Ubuntu and System76 forums but have not seen mention of this issue.