ARPANET...

Mosaic something...

Netscape then reached v4...

Communicator 5.0 never released...

Mozilla NGLayout (Gecko) rose from its ashes...

Then Phoenix, Minotaur spun out from the SeaMonkey...

Soon changed names to Firebird, Thunderbird...

And then to Firefox for the former...

We now look to the future...

On to 1 billion...

1000000000!

This was meant to be some ASCII art forming a triangle, I'm no poet. ;-)