[eitland]

> I'm still trying to figure out what UX problem the expanding bar was intended to address.

Possibly the same as removing navigation arrows from the context menu if text is selected, i.e. to annoy long time Firefox users like me?

Certain features should be compile time options, default off and then we could make a UX-designer edition with all the crazy stuff just line we have developer edition.

Then I and everyone else could continue you use the old ux that actually worked very well ;-)