Interaction designer Alex Faaborg has emerging details on the visual refresh that’s being worked on for Firefox 3:
Visual integration with Windows and OS X is our primary objective for the Firefox 3 refresh.
Fitting in to the visual appearance of the native operating system may seem like a reasonably obvious decision, but it certainly isn’t one that every cross-platform application or windowing toolkit makes.
On one hand I think it’s great that there’s a serious focus on making Firefox look truly native. On the other hand I think it’s a pity that it’s only going to look native, and not be native, but I suppose that’s one of the biggest challenges of crossplatform development. In any case, things certainly look more promising than the Firefox 2 visual refresh.