> FWIW, before Google Chrome, Firefox was originally Firebird (changed for name collision reasons), and Mozilla had broken off the rest of the Netscape-ish "communications suite" into Thunderbird, both arguably named after cars.

Mozilla named the web program Phoenix for rebirth. A company objected. Mozilla renamed it Firebird because phoenix was a fire bird. They named the mail program Thunderbird for similarity of Firebird.

Between Netscape Navigator and Firefox, their web browser was called simply "Mozilla". It supported GUI themes in XML with images which were officially called "Chrome". Mozilla also hosted user-contributed themes on a web site called "Chrome Zone".

The browser was considered slow and bloated however, and when Firefox came, its lack of theme support was perceived as part of it having been de-bloated.