How can I get rid of it. I am experiencing an invasive Yellow banner with a red icon on the left side. Banners pops up rapidly blocking navigation and viewing of websites. The banner is Usually very aggressive, There is an icon on the left side of the banner and this message is written on it: a website is slowing you down what do you want me to do? The options offered to me are stop or continue,. Actually, it does not respond to either answer. The X does not close the banner. Previously the bannered stopped all navigation or bounce the website repeatedly to provoke a response from the user. I learned to enlarge the screen recently and the banner seem immobilized. At present it seem to quickly hide but it invades often. The presence is visible when it loads into the sites, it freezes firefox. However, I do not know what it's real mission is. How can I destroy it or them? Thank you for your help.