McAfee Site Advisor is not compatible with Firefox 5. It is McAfee's responsibility to fix that. My understanding is that McAfee had planned an updated release in the 3rd week of July which has now been rescheduled for late August. '''''NOTE: Your McAfee protection is not affected, just that McAfee toolbar that is installed by McAfee into Firefox.''''' As far as I am concerned, such toolbars are not needed and are a duplication of what is already built in to Firefox. I do Disable the toolbar supplied by my security software provider and just depend on the built in Firefox function: *[http://www.mozilla.com/en-US/firefox/phishing-protection/ Firefox built-in malware and phishing protection] *Warning screens from Firefox: **http://www.mozilla.com/firefox/its-a-trap.html **http://www.mozilla.com/firefox/its-an-attack.html Firefox 5 is an update to the version that your are using, Firefox 4.0.1. Firefox 5 fixed some security and stability issues with Firefox 4.0.1, so you are leaving your system vulnerable by continuing to use it. In addition, Firefox 6 is scheduled to be released next week; hope McAfee is taking that into account. '''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.'''