Hi. Blank space appears above address bar in full screen mode when I bookmark specific web page for the first time after FF start. Only way to hide this space is View->Toolbars->Customize->Done. But it appears each time after FF restarts. Disabling all addons does not help. This problem disappears only in FF safe mode.
Solved! Go to Solution.
Hi romansobko, try to disable hardware acceleration and check it again(in safe mode hardware acceleration is disable).
see for more info : https://hacks.mozilla.org/2010/09/hardware-acceler
Disable all extensions and If the problem no longer occurs, one of your extensions was causing it, then re-enable each extension one at a time to check it.