From what I remember of VB (way back when) when you click on a control and then move to the properties box, you could double-click on one of the properties and it would immediately become editable. It would be nice if FF3 had that as well. I find it difficult sometimes to click directly on the changeable aspect of the property once to to select and a second time to begin editing.
For instance, in VB (again, as I remember) I could click on a control then double-click on the "Caption" attribute and immediately edit the caption. Now, I have to click on the control, click to the right of the caption once to target "caption" and a second time before I can begin editing it.
Yes, and True/False properties would switch right away.