Yes, Mozilla has been around for quite a while. Firebird isn't based on Mozilla though. Either way they are doing a great job of it.

I thought the first web browser was Mosaic, after doing a little research I found that it was about the 3rd GUI web browser.

1990, "WorldWideWeb" is the FIRST GUI webbrowser... later renamed to Nexus.

:dunno: Learned something new.
http://www.w3.org/People/Berners-Lee/FAQ.html