From Fedora Project Wiki
Helper page for Firefox transition to Gtk3
Doc:
http://www.mail-archive.com/gtkmm-list@gnome.org/msg15382.html
http://answerpot.com/showthread.php?1780119-Add+compat+macro+for+GDK_DISPLAY
http://library.gnome.org/devel/gtk/unstable/migrating.html
http://library.gnome.org/devel/gtk/unstable/api-index-3-0.html
Replacements:
GDK_DISPLAY() -> GDK_DISPLAY_XDISPLAY(gdk_display_get_default())