When I switch off my laptop from dock station (computer is connected to monitor) and open laptop (screen resolution changed) then firefox have problem with font size on firefox tabs (web page names). It don't work correctly in both directions. When I attache my computer to dock station the same problem is present. Additionally during connecting and disconnecting from dock station windows is in sleep mode. So when it start running resolution changing just after start. It is related only to window with big number of tabs and not for all firefox windows. My system is windows 10. Firefox 47.0.1 64 bit