Mozilla Firebird?

Yes, it’s an early name for Firefox.

An article from several years ago:

http://itvibe.com/news/1259/

Firebird becomes Firefox
Mozilla forced to rename Firebird browser
Tuesday, February 10, 2004 at 11:49
by Rich Kavanagh

Popular open source web browser firm The Mozilla Foundation, have been forced to rename their browser.

Known to most people as Firebird, this is the second time they’ve been forced to rename it.

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