[ Thanks to MonMothma for this link.
]
“Past and current versions of Mozilla’s Firefox 2.0 browser tend
to look the same as their predecessors in the 1.5.x series.“Starting with Firefox 2.0 Beta 2, that look changes a bit.
“Firefox 2.0 Beta 2 introduces a visual refresh for the Firefox
browser. The refresh is hardly as dramatic as the change between
Microsoft’s in-development Internet Explorer 7 and Internet
Explorer 6.x, but it is something the Firefox faithful will
notice…”