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> (firefox:27799): Gtk-ERROR **: 04:42:18.938: GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same
> process is not supported

You have both gtk2 and gtk3 engine installed and TDE is not happy. TRy removing one of them and it will work. Had the
same issue a few weeks ago when I was testing something related to GTK

Cheers
  Michele
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