Re:DuckDuckGo Challenges Google on Privacy (With a Billboard...
by sp332 on Wednesday January 19, 2011 @11:55PM
(#2122702)
Firefox (at least) will still send referrer info when you navigate to a https: site from encrypted Google. You can change this in about:config by changing network.http.sendSecureXSiteReferrer to false.
Source: http://kb.mozillazine.org/Network.http.sendSecureXSiteReferr...