It was originally Minotaur (when the browser was Phoenix), then they were Firebird and Thunderbird, until the browser renamed to avoid a name clash.

I really don't remember (+quick check) Firebird for the email client, do you have source for this?

wisidisi 4 hours ago | parent | next [-]

Predecessor of Firefox was Firebird, and before that it was even called Phoenix.

	▲	Foobar8568 an hour ago \| parent [-]
		So it wasn't used before Thunderbird, that was the point of OP and myself. We were talking about the email client(!). And I was an user of firebird, the database.

Firebird was the browser's name, after phoenix and before rebranding to firefox.

	▲	Foobar8568 an hour ago \| parent \| next [-]
		So it wasn't used before Thunderbird, that was the point of OP and myself. We were talking about the email client(!). And I was an user of firebird, the database.
	▲	dizhn an hour ago \| parent \| prev [-]
		Firebird was actually the database whose name they hijacked when they had access to AOL's legal army. Also K9Mail is now Thunderbird for Android.