Disable unredirect fullscreen windows by default
Wouldn't it be better to disable unredirect fullscreen windows by default, like KDE do ?
Unredirecting fullscreen windows generate tearing on all fullscreen apps that doesn't implement their own vsync mechanism or use _NET_WM_BYPASS_COMPOSITOR (eg. almost all apps like evince, eog, libreoffice, etc... even in firefox and chrome the video playback and navigation still have tearing on Gnome since _NET_WM_BYPASS_COMPOSITOR will only be supported in their next version).
Unredirect fullscreen windows can be a gsettings / gnome tweak feature and the apps that need to be unredirected should use _NET_WM_BYPASS_COMPOSITOR.