Unable to download or save files

Hello.

I have installed Comodo Pro (freeware) and I am now unable to download and save files using the Firefox 3 browser.

I do not see anything in the settings that allows me to modify settings for downloads.

It’s very frustrating for me to not be able to use this computer for work. Can someone help me understand what I must do in order to download files correctly?

Thanks, So far I like this firewall, but I am not used to modifying advanced settings like this. I do other things for a living and hobby. Your answer was the helpful direction I needed. Thanks.