Ok I found a way to workaround this issue. Downgrading libmozjs-24-0 to the version in testing 24.2.0-3 fixed the issue:
$ sudo apt-get install libmozjs-24-0/testing For the record the first non working version is 24.2.0-4. Regards, -- Pascal Obry / Magny Les Hameaux (78) The best way to travel is by means of imagination http://www.obry.net gpg --keyserver keys.gnupg.net --recv-key F949BD3B