This appears to me to be a firefox-dev bug - gxine's build-deps are correct.
What I think is needed: (a) symlinks from /usr/lib to /usr/lib/firefox for the shared libs, and (b) appropriate use of dpkg-divert in libmozjs* etc.
Ideally, gxine wouldn't build-dep on firefox-dev.
This appears to me to be a firefox-dev bug - gxine's build-deps are correct.
What I think is needed:
(a) symlinks from /usr/lib to /usr/lib/firefox for the shared libs, and
(b) appropriate use of dpkg-divert in libmozjs* etc.
Ideally, gxine wouldn't build-dep on firefox-dev.