[Pkg-mozext-maintainers] Bug#850452: xul-ext-stylish: privacy concerns

[W. Martin Borgert]

Package: xul-ext-stylish
Version: 2.0.3-2

According to different articles, such as

http://www.ghacks.net/2017/01/04/major-stylish-add-on-changes-in-regards-to-privacy/

and

https://www.heise.de/newsticker/meldung/Browser-Add-On-Stylish-laesst-Nutzerdaten-sammeln-3585601.html

there are privacy problems with stylish. An opt-out seems to
be possible on Chromium, but not on Firefox. Also, at least
for a Debian package, this should be opt-in, not opt-out.

This does not look as severe as #842939, but still...