This may happen automatically, or you may have to do it.If you deny access, you must reconfigure the security software to allow access.For example, Comodo doesn't have just one rule for Thunderbird, it creates rules that also specify what application launched Thunderbird.This can include one for Windows Explorer, Firefox, and even Thunderbird launching itself when it upgrades.The Windows Subsystem for Linux feature may be disabled during a Windows update.
The firewall may be a freestanding program, or it may be part of an Internet security package.
Because of a bug, the Kaspersky firewall may continue to block Internet access even though it is supposed to be disabled.
 Access may be blocked even if only the Kaspersky Antivirus program is running. As with any firewall, the best solution is not to disable it, but to configure it to allow the updated application. The Kaspersky firewall can also interfere with pipelining  In some cases, it may be necessary to delete the application rule for Firefox/Thunderbird/Mozilla Suite/Sea Monkey, then grant access the next time you are asked.
If you need more help configuring the Comodo Firewall component to work with your Mozilla application, visit Comodo Support.
For details on configuring Comodo Internet Security to work with Firefox, see Configuring Comodo Internet Security (Firefox Support) .