Those are very annoying. Do you have a McAfee add-on installed? If so, you could check its settings to see whether it has a way to turn off notifications.

If that doesn't resolve it, here are three things to check:

(1) Remove notification permission for any unknown/unwanted sites. Here's how:

On the Settings page, in the tiny search box, slowly type perm to filter the page to the Permissions section. To the right of Notifications, click Settings. Remove permission for any sites that you don't trust.

(2) Unregister any unnecessary Service Workers. Here's how:

Type or paste about:serviceworkers in the address bar and press Enter to load that page. These background scripts keep running even after a page's tab is closed. Unregister everything you don't visit frequently as well as everything you do not need notifications from.

(3) Purge any untrusted extensions. Here's how:

Open the Add-ons page. Either:

• click the Extensions button (puzzle piece) on the toolbar > Manage Extensions
• Ctrl+Shift+a (Mac: Command+Shift+a)
• "3-bar" menu button (or Tools menu) > Add-ons
• type or paste about:addons in the address bar and press Enter/Return

In the left column of the Add-ons page, click Extensions. On the right side, find the "Manage Your Extensions" heading.

If there is at least one extension before the next heading -- "Recommended Extensions" -- please continue:

Then cast a critical eye over the list below that heading. Any extensions Firefox installs for built-in features are hidden from this page, so everything listed here is your choice (and your responsibility) to manage. Anything suspicious or that you just do not remember installing or why? If in doubt, disable (or remove). For your privacy and security, don't let mystery programs linger here.

Any improvement?

Note: Sometimes extensions can frustrate access to this page. In that case, first restart Firefox in its Troubleshot Mode and then try again. See: Use Troubleshoot Mode in Firefox -- Open, not Refresh.

Hello in German: wie kann ich die ständigen Wornungen vor Viren stoppen, wenn dasSystem durch Avira und McAfee geschützt ist? How can I stop the constant virus warnings if the system is protected by Avira and McAfee? Thnks

[edited email from public]

Hello in German: wie kann ich die ständigen Wornungen vor Viren stoppen, wenn dasSystem durch Avira und McAfee geschützt ist? How can I stop the constant virus warnings if the system is protected by Avira and McAfee? Thnks

Are the warnings/notifications coming from your security software? Those might have more detail on the problem, for example:

• they might mention a path to a file in Firefox's web content cache or storage folders
• they might mention a URL that they blocked

Those could provide some clues to help solve the problem.