How to get GTK3 Emacs keybindings (for Firefox)?

[cadddr]

When I build Firefox using GTK2, I can tell Firefox to use Emacs-style keybindings by adding gtk-key-theme-name = "Emacs" to ~/.gtkrc-2.0. When I switch Firefox to GTK3, I can't find a way to set the key theme.

 

[protocelt]

Haven't used Emacs key-bindings before for anything but a quick date with Google turned up this.

 

[cadddr]

Built Firefox again with GTK 3.0, and setting the key theme via dconf doesn't work. Tried http://askubuntu.com/a/233539 too, but the corresponding schema doesn't exist.

 

[ANOKNUSA]

KeySnail.