fx 3.6.13, NS 2.0.9.1, new profile, block iframes, apply to trusted, allow recaptcha.net
http://hackademix.net/2010/12/28/x-do-n ... -noscript/
Since the recaptcha iframe is blocked, the icon should be "untrusted with puzzle" instead of

, which implies the trusted iframe is loaded
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13