When my free version of ZA (Check Point) is running, I can open multiple Firefox tabs or IE windows from within the browser. I can also open multiple browser sessions by clicking the browser exe. However, I can only open one session from a URL embedded in external window (Thunderbird email messages for example). If I shut down ZA, I am able to open multiple windows/tabs from external links.

I currently have both Internet Zone and Trusted Zone security set to Med. I assume need to make firewall adjustments but need some help identifying which ones.

Operating System:Windows XP Pro
Software Version:6.5
Product Name:ZoneAlarm (Free)