NEED HELP BROWSING HISTORY IS NOT GOING AWAY !

enolcys

Whats going on guys. It may seem like a simple issue but it is not. basically i have been selected for a compliance audit at my company. I am running Red Hat Linux 6. I wanted to clear out my browsing history In firefox version 17. I haven't been browsing anything bad, but technically i am not even supposed to check my yahoo e mail or even read news articles on this computer. I know these guys are UhHmm ducks. anyway I cleared my browsing history of all that stuff. i deletes almost all of the cookies. However when i run this compliance check tool it finds all these sites..... How is that possible if the browser history is gone? Any help would be greatly appreciated. If i don't clear it nothing will really happen to me. they aren't going to fire me but they will give me a hard time and i will technically be non compliant..... thanks in advance.