I'm sure some of you are already aware of this, but with some work i got RetroZilla (originally a win9x fork of seamonkey with TLS 1.2 support added) to build on Tiger. I originally was hoping it would run on 10.2/10.3, but apparently it doesn't (yet). Anyway, still fun to mess with and see what sites still render perfectly with a browser from 2007.

More info and download here.