From the now-defunct Mac:Intel wiki page:

18:41, 8 May 2008 Josh (Talk | contribs) deleted page Mac:Intel (content was: ‘The Intel Mac work for Firefox, Thunderbird, and Camino is done. All fixes are checked in. You can build for Intel Macs from the cvs trunk and any bra…’)

I’ll need to ask Clara if I can build Intel Mac versions of Mozilla software in one of hers, to try. For science.