In Firefox, go to the Permissions section of ''about:preferences#privacy''. Open the Notifications Settings and remove the website to prevent it from sending notifications.

''<p>Vincent Machnig [[#question-1512149|said]]</p>'' <blockquote>Picture of message attached. How do I fix? </blockquote> https://support.mozilla.org/en-US/kb/push-notifications-firefox https://support.mozilla.org/en-US/kb/push-notifications-firefox#w_how-do-i-revoke-web-push-permissions-for-a-specific-site This looks to be a web push notification from a site you have allowed to send you notifications from. Instead of useful information some may instead send you junk, spam, fake trojan/virus alerts and such. You can revoke these sites from sending you notifications.