GTK3 widgets are not displayed in Firefox experimental

[Mike Hommey]

On Wed, May 11, 2016 at 12:39:07PM +0200, fzacarias3k . wrote:
> Hi!
> 
> I'm running debian sid with firefox from the experimental archive and I
> noticed that the last 2 major releases (46 and 47) have enabled GTK3
> widgets.
> Unfortunately, those are not displayed at all: no checkboxes or radio
> buttons. Even scrollbars are gone. See attached screenshot.
> 
> As you can imagine, that's very annoying and makes surfing the web quite
> difficult, specially when filling registration forms.
> 
> Is there a way to disable gtk3 widgets and go back to the previous way? Or
> is there a way to configure this and make it work?
> I'm not running a full Gnome3 desktop but just a window manager (awesome).
> I will also note that gtk3 apps like eog or evince work fine and display
> their widgets correctly.

Either downgrade gtk to 3.18 or downgrade Firefox to the version in
unstable, which switched back to gtk2 until the issues with gtk 3.20
are fixed.

Mike