Comment 28 for bug 507089

NSPR provides a analogue of dlopen that works on all Mozilla/Firefox/TBird
platforms and is present in every FF browser and TB mail client (SM too).
See documentation here
http://mxr.mozilla.org/nspr/source/nsprpub/pr/include/prlink.h#94
http://mxr.mozilla.org/nspr/source/nsprpub/pr/include/prlink.h#181