I am not a skilled graphic artist. This is by no means a “final” XULRunner logo. I just created it in my spare time and it is a lot of fun:
In case you don’t remember your Greek mythology, Atlas was condemned to bear the heavens upon his shoulders by Zeus as punishment for leading the Titans in their war against the gods. I thought that the idea of holding up the Firefox globe was a fitting visual metaphor for XULRunner.