I have Windows 8.1 and have uninstalled Browser Champion with Iobit Unstaller but the advertisements continue in Mozilla Firefox.
Hi Bruce, make sure you remove Browser Champion (and any other suspicious) plugin from your Internet browsers. This adware is known to hide under different names, so when you search for it in your Control Panel or Internet browser setting, make sure you remove all suspicious applications (most commonly coupon or savings related). After the removal scan your computer with Spyhunter and/or Malwarebytes Antimalware - both of these programs are capable of detecting and removing Browser Champion adware. You can also scan your PC with AdwCleaner - https://toolslib.net/downloads/viewdownload/1-adwcleaner/