Bug#843810: libgtk-3-0: gtk3 >= 3.21.4-1 does not show a menu in Firefox, virt-manager and probably many others

[Jason Crain]

On Wed, Nov 09, 2016 at 09:26:34PM +0100, Marc-Christian Petersen wrote:
> there seems to be a problem with gtk3 >= 3.21.4-1. Please see #839029 also.
> When using gtk3 3.21.4-1 or above, virt-manager, Firefox and maybe also others
> are not able to show a menu (when pressing Alt-F for example). Downgrading gtk3
> to 3.20.9-1 fixes it, so Firefox and virt-manager are usable again.

Alt-F in firefox and virt-manager works fine for me.  What version of
firefox are you using and where did you get it from?  What desktop
environment are you using?  Are you using any themes or the default
Adwaita theme?  Does it work differently if you try in wayland vs xorg?