Please add a mozilla-nss.pc compat symlink pointing at nss.pc. This will allow all existing applications to detect nss and maintain backward compatibility. The gaim project requests this change.
wontfix. NSS and mozilla are on different release schedules, so the versions that previously were in mozilla will not work with an NSS of the same release number (they are binary and API incompatible). Change the checks to nss unconditionally. Alternately, try nss, if that fails, fall back to what was happening before.