Firefox can't connect with firewall engaged.

Avast Free Antivirus / Premium Security
1

Just installed Avast! Internet Security 5. With the firewall activated, I cannot connect to the internet or check e-mail. (My computer does show me as being connected to my network.)

With the firewall disengaged, I can connect without delay.

Thanks,

z.

2

Does Firefox/Mozilla have an entry under application rules yet?

3

What was the previous AV and/or firewall installed, and how was it removed?
What OS?