http://support.google.com/installer/bin/answer.py?hl=cn&hlrm=en&answer=126299
ftp://ftp.mozilla.org/pub/firefox/releases/latest/
http://support.google.com/installer/bin/answer.py?hl=cn&hlrm=en&answer=126299
ftp://ftp.mozilla.org/pub/firefox/releases/latest/