seamonkey-2.12.1 can view the reCAPTCHA but mozilla-firefox-28.0 cannot

Hello,I have a problem:seamonkey-2.12.1 can view the reCAPTCHA but mozilla-firefox-28.0 cannot.This is on this webpage:http://bit.ly/1uPAFW3 have disabled all Extensions on Firefox.Can you explain this strange behavior?Thank you.Best regards. -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://bit.ly/1dkFnYd. For more options, visit http://bit.ly/P65DvS.