Hi relentless157804, This could be caused by a malware infection on your computer or it could be caused by an add-on that you have installed. You can try these free programs to scan for malware, which will work with your existing antivirus software: Microsoft Safety Scanner https://docs.microsoft.com/en-us/windows/security/ threat-protection/intelligence/safety-scanner-download MalwareBytes Anti-Malware https://www.malwarebytes.com/premium/ Anti-Rootkit Utility - TDSSKiller https://www.bleepingcomputer.com/download/tdsskiller/ MalwareBytes AdwCleaner https://www.malwarebytes.com/adwcleaner/ ESET Online Scanner https://www.eset.com/us/home/online-scanner/ (Malwarebytes Chameleon - allows installation of Malwarebytes on an infected system https://www.malwarebytes.com/chameleon/) Running more than one or all of the above mentioned Scan Tools is recommended since they scan at different levels of your computer. And, of course, run the scans with Firefox Closed. There are also extensions available to help protect against malware, such as: Malwarebytes Browser Guard https://addons.mozilla.org/en-US/firefox/addon/malwarebytes/ Further information can be found in the Troubleshoot Firefox issues caused by malware article: https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware ___________________________________________________________________ If that doesn't fix the issue, try running Firefox in it's Safe Mode: https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode to see if the issue goes away. If it does, it's likely caused by an add-on, so you will need to use trial and error to determine the culprit. Hope this helps.

. '''Whenever you get a message / popup like that;''' <u>'''DO NOT USE ANY OF'''</u> <u>'''THE PROVIDED LINKS'''</u> <u>'''OR ANY PHONE NUMBERS ! !'''</u> Such messages are only '''Spam''' that could lead you to '''Fake Support.''' Not only can they damage or hack your system, they charge you to do so. You can report such a site at; '''[http://www.google.com/safebrowsing/report_phish/ Google Report Phishing Page]''' {web link} which is the same when done while on site by going to '''Help > Report Web Forgery''' '''[http://www.mozilla.org/en-US/legal/fraud-report/ Help us safeguard Mozilla’s trademarks by reporting misuse]''' {web link}