How do I stop website notifications in Mozilla Firefox?

If you are seeing pop-up warnings or adverts from Firefox, a website may have permission to send you notifications. You can check and remove this permission in Firefox's settings.

1. Open Firefox.
2. Click the three lines in the top right corner, then click Settings.
3. Click Permissions and data on the left.
4. Click the Notifications button under Permissions.
5. Select any website you don't recognise and click Remove Website, or choose Block from the drop-down next to it to stop it asking again.
6. Click Save Changes.

Once removed, that website can no longer send you notifications.

For more detail, see Mozilla's guide: https://support.mozilla.org/en-US/kb/push-notifications-firefox