You don't. McAfee doesn't support beta-anything. Actually they are still working on redesigning SiteAdvisor so it will work in Firefox independently of browser version number. It's disabled in Firefox 5 for that reason. Resolution should be early to mid-August when I last had news.
Also I should mention that Norton's equivalent is having the same issues.
as allways your information have been very usefull,but it is correct that mcafee site advisor works with google chrome beta i have it installed,but i use firefox right now its faster and is easy to acsesss the features. good weekend Ex_Britt Kind Regards CASI
If it works with beta browsers of any make then it's pure conincidence. Good luck.