If by standard N9, you mean in closed mode with fully enforcing Aegis, I don't know. I had wanted to do that, but wasn't successful. I suspect it may be doable if you rebuild aegis-certman first AND reinstall all the codesigning certificates with both old and new hashed symlinks. I did not reinstall those certs, just the CA ones, as I am in open mode.

Another possible solution would be to figure out what's keeping Fennec 15 from using the newer ciphers in libnss, fix that, and rebuild it, leaving the base Harmattan system untouched. I haven't checked into this yet, but it would be even nicer to backport a newer version of Fennec - but it's probably a porting nightmare.