Firefox is blocked

I am running AVG Ultimate 18.3.3051 on a Windows 10 machine.  Up until a couple of months ago, Firefox (Version 59.0.2) was my default browser, but suddenly stopped being able to get out to the internet.  I assume something in the firewall is blocking it.  I tried one of the answers for a similar question I saw for modifying firewall settings, but it did not work.  Any suggestions?

User conrad zen has posted their own topic (https://support.avg.com/answers?id=9060N0000000Y7GQAU).
AVG Guru

Hello Edward,
We’re happy to help you sort this out. May I know if the issue is resolved when AVG protection is disabled? Right click on AVG system tray icon and toggle the On/Off slider to disable AVG protection.
Best regards,
Alok.

Hello Edward,
We’re happy to help you sort this out. May I know if the issue is resolved when AVG protection is disabled? Right click on AVG system tray icon and toggle the On/Off slider to disable AVG protection.
Best regards,
Alok.
User conrad zen has posted their own topic (https://support.avg.com/answers?id=9060N0000000Y7GQAU).
AVG Guru