Recently I am noticing advertisement on every page I visit in Firefox. ( In chrome everything works fine ). Even in Stackoverflow/stackexchange I see advertisement ( Hover over text to see the advt) . The link to all advt is awardhotspot.com. I guess one of the FF addon is creating these advt.
I have just three addons in FF.
1. Adblock Plus 2.5.1
2. Free Download Mgr plugin 188.8.131.52.
3. Download helper 4.9.21
How to find out what is adding all these advt. in all pages?