I'm currently working on packaging Geant4 for Debian, as part of this I found a potential problem: extended/parallel/TopC/info/README.html loads https://www.ccs.neu.edu/home/gene/new.gif, which is considered a "privacy breach" (https://lintian.debian.org/tags/privacy-breach-generic.html). Note that this doesn't means links are prohibited in offline documentation, only embedded scripts or pictures. Usually I just patch this stuff out, but while taking a look at this picture and the html, it really can simply be replaced by its alt text "New!" upstream.
Issue fixed; will appear in next release. Thanks.