Comment 2 for bug 629631

John,

This is a workaround.

You probably have too new xulrunner (=1.9.2.9+build1) installed.
Package libgjs0a depends on xulrunner_1.9.2.8, and conflicts with > 1.9.2.9+.
So, downgrade xulrunner.
You also need to create a symlink into the directory /urs/lib/ which points to file /usr/lib/xulrunner-1.9.2.8/libmozjs.so
or
copy the file /usr/lib/xulrunner-1.9.2.8/libmozjs.so into the directory /usr/lib/

And that's it.