In case you weren't paying attention, the branding was only changed in the Amazon listing and maybe the physical packaging: I haven't bought any of those, but considering that they just blurred / cut the window names from those screenshots, I assume they didn't do anything else.
Branding an application with a different name (i.e. removing all references to the old name from the code-base) takes effort and it's not just a matter of changing the main window title. Just ask the Debian people that rebranded Firefox to IceWeasel.
You can't put the Mozilla Mark(s) on anything that you
produce commercially (whether or not you make a profit) --
at least not without receiving Mozilla's written permission.
But what you can do:
distribute unchanged Mozilla product(s) (code + config) for
each platform downloaded from www.mozilla.com
or www.mozilla.org as long as you distribute them
without charge
And the reasoning for this, as explained:
In addition, on an all too frequent basis, we receive
reports about websites selling the Mozilla Firefox browser,
using the Mozilla Marks to promote other products and
services, or using modified versions of the Mozilla Marks.
The problem with these activities is that they may be
deceptive, harm users, cause consumer confusion, and
jeopardize the identity and meaning of the Mozilla Marks.
Of course, many open-source projects don't even have registered trademarks, but (I am not a layer so take this as an opinion) ... even unregistered trademarks are protected and I think you can still sue successfully somebody if it brings harm to the project's image.
This shouldn't be an issue here, as they've changed the names. They, e.g., sell Scribus as "Desktop Publishing Studio".