Hi all, When the Firefox titlebar is disabled, along with the upper monitor taskbar, a white bar appears in the above monitor when Firefox is fullscreened. Looks like some sort of scaling issue, tried disabing/enabling everything in compatibility tab as suggested with similar errors, reintalled drivers, changed aspect ratio etc. Both monitors are plugged in via Displayport, above monitor is 1080p below is 1440p. 2 screenshots attached, 2nd shows if you fullscreen by dragging into border boundary. Windows version 19042.630, Nvidia drivers latest. Only remedy so far seems to be to enable the titlebar in Firefox or have a taskbar on the upper monitor, both are less than ideal. Cheers