A WOT colored Icon will show up near your location bar when you go to a site or bookmarked site.

if you do a search and get a list of results - then the Wot colored icons will show up after each link or site listed showing if OK, caution or bad.

If site is really bad a black screen with a big warning message comes up.

alright - here's a video about how it looks
http://www.youtube.com/watch?v=2BuhjlOBzu8