(this is still present in 4.0~b8-1, present only in mozilla.d.n)
about:license mentions, among other things:
“Binaries of this product have been made available to you by the Mozilla
Project under the Mozilla Public License. Know your rights.”
...which obviously not the case.
about:rights is also stub text, e.g.
“* Any applicable privacy policies for this product should be listed
here.
* If this product incorporates web services, any applicable service
terms for the service(s) should be linked to the Web Site Services
section.”
Regards,
Faidon