What to do about false positives?

I keep getting false positives on a liverail.com ads. I've checked with site I go to regularly & they say there is no malware, virus, etc on their site or the ads they show. Webroot will sometimes block the whole page or restarte that page.  This is a site that I have been going to for years & have never had any issues until I install Webroot Internet Security.
 
Any suggestions?
 
 
 
 
I'm using Firefox & it is update to date, windows 7 , also up to date.