Avast Firewall block internet connection after re-enable

Hi!

I stopped the firewall for 10 minutes and after re-enable it I can not reach any website in the Firefox.

Win 7 x64
Firefox 25
Avast IS 2014.9.0.2008

Same thing also happens to me. Interesting though that while I can’t access any webpages in Firefox, Thunderbird has no problems sending and receiving email. Only way I found to fix the problem is to reboot.