I was inspired by this comment to install Netscape 7.02 from my installer archive.[0] It too has a logo with meteors, but it is circle-shaped instead of square, and the meteors follow a more winding path from top to bottom.

Interestingly, when I first tried to install, it said something like "A version of Netscape is detected already running", which is because as you state Firefox was based on Netscape code. Here is the "About" description:

Mozilla/5.0 (Windows; U; Windows NT 6.2; en-US; rv:1.0.2) Gecko/20030208 Netscape/7.02

[0] I tried earlier versions, but they all wanted to download the full install from an FTP site that is no longer responding.