Yep, very good point. Inserted a paragraph about it on page five ("Firefox 1.0") - thanks :)
Neither Fx nor Tb were part of the app suite--they were both offshoots that, at the time, really violated what the project was aiming for. The story of how Firefox came to be and roguish it was seen within the organization at the time is interesting.
I would love to read a real oral history of Firefox someday.