Hi, JFYI, firefox-18.0p0, firefox-18.0.1 and firefox-19.0beta1 built by gcc4 works fine on i386, at least for me.
Just a trivial diff for firefox-18.0p0: --- /usr/ports/www/mozilla-firefox/Makefile Tue Jan 15 09:14:43 2013 +++ /usr/ports/mystuff/www/mozilla-firefox/Makefile Fri Jan 18 23:27:09 2013 @@ -35,9 +35,9 @@ # necessary glue to build with the correct compiler after fx 17 MODULES += gcc4 lang/clang MODGCC4_VERSION = 4.6 -MODGCC4_ARCHS = powerpc +MODGCC4_ARCHS = i386 powerpc MODGCC4_LANGS = c c++ -MODCLANG_ARCHS = i386 amd64 +MODCLANG_ARCHS = amd64 MODCLANG_LANGS = c c++ USE_GROFF = Yes
