To get rid of the pop-ups and all the things that drive you mad, simply run AdwCleaner. Download a copy of the program from the official website and then launch it. Accept the licence agreement and press on Scan. Make sure the browsers are all closed. After the scan is completed, press on Clean button and reboot the computer. The add-on with the pop-ups will be removed from your computer. If you want to be sure, run the software again.