hi, this is a fraudulent message - do not call that number or follow any instructions on that site. some steps to rule out that you have adware/malware on ysour system already that might be triggering this: #go to the firefox ''menu ≡ > addons > extensions'' & remove any suspicious entries (toolbars, things that you have not installed intentionally, don't know what purpose they serve, etc). #also go to the windows control panel / programs and remove all toolbars or potentially unwanted software from there. #finally, run a full scan of your system with different security tools like the [https://www.malwarebytes.org/antimalware/ free version of malwarebytes] & [https://toolslib.net/downloads/viewdownload/1-adwcleaner/ adwcleaner], which are specialised in adware and browser hijackers. [[Avoid and report Mozilla tech support scams]] [[Troubleshoot Firefox issues caused by malware]]