./firefox gives me:
Gtk-Message: Failed to load module "canberra-gtk-module": ld.so.1: firefox-bin: fatal: libcanberra-gtk-module.so: open failed: No such file or directory
ld.so.1: firefox-bin: fatal: relocation error: file /usr/lib/libgnomeui-2.so.0: symbol g_malloc0_n: referenced symbol not found
The last few releases were the same. Currently using 14.0.1. I can't find a better palce to file this problem.
Are you in Australia?
The old OpenSolaris wiki page is still good for this and has the email address you can use for bug reports:
Did you download the Solaris 10 build or the 'opensolaris' build?
That message is generally seen because the Solaris 10 build was used which has different dependencies.
I am running 16.0.1 currently on a Solaris 11 system.
If you grab the build marked as opensolaris from the mozilla site (http://ftp.mozilla.org/pub/mozilla.org/firefox/releases/latest/contrib/) it should work