All,
starting from mozilla.org jump to projects.
In the list you see XPToolkit and NewLayout directly followed by each other.
I haven't been able to exactly determine the essense and differences between
them, but I mainly live in the XPToolkit path these days. You can easily see
that these pages are up-to-date.
I can't get rid of the feeling that the one (NewLayout) is the plan and the
other (XPToolkit) is the real work.
The widget set in the XPToolkit path is smaller than the one in the
NewLayout/Technical documentation path.
Norbert