overloaded, I'm not exactly sure if this is what's happening - but it sounds as though you are visiting a website that uses SSL security. If that's the case, the likely cause of the security message in Firefox is because it doesn't have the SSL certificate listed in it's Trusted certificate store. Since Firefox does not use the certificate store that exists in Windows, the SSL certificate will need to be manually added in Firefox. Internet Explorer, on the other hand, uses Windows' certificate store to authenticate websites. The reason for any SSL warning is one or more of the following: 1.) The certificate for the site has expired. 2.) The certification path cannot be completed or is not trusted all the way through. 3.) The certificate has been revoked by the issuer (same as 1, but for different reasons). However, in this case it is the second reason. This leads me to believe that the site is safe, you just need to import the site's certificate into Firefox before Firefox can trust it. SSL is SSL - to my knowledge there aren't different vendor implimentations. For that reason, if Internet Explorer trusts the site then it's a good bet that it is a trustworthy site. It's probably safe to import the certificate into Firefox and continue browsing. -David PS - If someone knows I'm wrong, I'm open for correction. I'd rather not be spreading false information around :)