Firefox missing dependencies

A recent attempt to build www/firefox under poudriere completed successfully,
but the resulting binary failed to run, reporting:
bob@nemesis:~ % firefox
XPCOMGlueLoad error for file /usr/local/lib/firefox/libxul.so:
/usr/local/lib/libnss3.so: version NSS_3.79 required by /usr/local/lib/firefox/libxul.so not found
Couldn't load XPCOM.

I've tried running make clean and re-running git in /usr/ports, but a second
attempt to re-build www/firefox under poudriere using
poudriere bulk -j main www/firefox > firefox.log
promptly reported 

Status stopped:done:

Is there a more thorough cleanup procedure to be tried? Ports are up to date as of
today, world, kernel and poudriere-system are from 
FreeBSD nemesis.zefox.com 14.0-CURRENT FreeBSD 14.0-CURRENT #7 main-3c4f8adc79: Thu Aug  4 09:21:31 PDT 2022     bob@nemesis.zefox.com:/usr/obj/usr/src/arm64.aarch64/sys/GENERIC arm64

Thanks for reading,

bob prohaska