edgy+1 here, revisiting. The issue is not really about libsmjs1[-dev] (which is obsolete) but libmozjs0d-dev.
-- Impossible to install libsmjs-dev with firefox present https://launchpad.net/bugs/57161 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
