Hmm I wonder if these are web push notifications from one or more sites you have allowed to send you notifications. Perhaps you can revoke the site(s) sending you these notifications.

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

James, Thank you for responding. The notifications are only for Emails that somehow are prioritized. If I could undo the "prioritizing" I think the problem might go away.

Hi,

If you're using a third-party website, the issue falls beyond the scope of this forum. In such a case, the reply above is the best we can recommend.

If you are using Thunderbird, please let us know, and we'll move your question to the corresponding forum.