Setting the milestone to 6.10. libnspr4 (firefox) uses unversioned sonames, and conflicts with libnspr4-dev:
/usr/lib/libnspr4.so /usr/lib/libplc4.so /usr/lib/libplds4.so libebook1.2-9, libedataserverui1.2-8 and firefox depend on libnspr4, so basically you cannot do any development using libnspr4-dev and libxul- dev in edgy (same with libnss3 and libnss3-dev). Proposed solution for edgy+1: build firefox using the xulrunner -dev packages Proposed solution for edgy: change the sonames for the libraries in libnspr4 and libnss3 from *.so to *.so.0ff ** Changed in: firefox (Ubuntu) Importance: Undecided => High Status: Unconfirmed => Confirmed Target: None => ubuntu-6.10 -- 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