**1-802-557-0358 how to stop Thunderbird antivirus pop ups?** Thunderbird 24/7 Support Number +1-802-557-0358. You can stop Thunderbird antivirus pop-ups by enabling Silent Mode in the Thunderbird settings, which blocks most notifications for a set period. To stop promotional offers and other notifications, go to Administrative Settings and disable specific options like "Special Offer Notifications" and "Thunderbird Task Notification". You should also check your web browser's notification settings to block any pop-ups originating from specific websites, as shown in Microsoft Learn.