All GTK input methods should have a label string. A workaround for this issue is running firefox with the environment variable GTK_IM_MODULE set to the label string. For example, to use X input method, instead of choosing the "X Input Method" in the right-click menu, you can invoke firefox with:
$ GTK_IM_MODULE=xim firefox
I believe this label string can be found in file /etc/gtk-2.0/gtk.immodules.
For your information:
All GTK input methods should have a label string. A workaround for this issue is running firefox with the environment variable GTK_IM_MODULE set to the label string. For example, to use X input method, instead of choosing the "X Input Method" in the right-click menu, you can invoke firefox with:
$ GTK_IM_MODULE=xim firefox
I believe this label string can be found in file /etc/gtk- 2.0/gtk. immodules.