Mozilla doesn't build Firefox for Solaris, but does host builds contributed by a third party, namely the Oracle Solaris Desktop Beijing Team.

See: http://releases.mozilla.org/pub/mozilla.org/firefox/releases/latest/contrib/

Thanks, jscher2000, for your prompt reply. I looked at the builds you pointed me to, and they are 13.0.1, so that's good. Should I be concerned they were built in China? --Dale

Hi Dale, I don't know whether you should be concerned that they were compiled in China. I imagine a lot of users inside Oracle use them as well. Maybe search around a bit on that one and see what you think.