If I use the close window shortcut (ctrl+shift+w) in Firefox it fails to close the window and treats every action I try to take as if the shift and ctrl keys were held down. For example, clicking on a tab will select it as if I were trying to move it as a group, rather than switching to it. Or, pressing only the T key will reopen closed tabs as if I had pressed ctrl+shift+T. This behavior will persist in Firefox until I close out of it completely and reopen. This does not occur when any other application is focused and ctrl+shift+w is pressed, and the effects are isolated to Firefox only when it does occur. Due to this, I do not believe that it is a hardware issue, eg. my keys just getting stuck. I haven't seen anything online that even vaguely resembles this issue. Any solution would be appreciated, even if it is disabling the ctrl+shift+w shortcut, as I keep pressing it out of habit and needing to close and reopen all of my tabs.