The site displays fine here without user intervention. I don't see any
character encoding set for the page looking at the source code of the
page created using HTML 2.0, I could have missed it.
Even the source code displays the umlauts.
I don't see anywhere in my Firefox to select Unicode. The only place I
can think of would be Tools > Options > Content > Advanced "Character
Encoding for Legacy Content", "Fallback Character Encoding". Mine is set
to "Default for Current Locale". I don't see Unicode in the list of choices.
--
Kubuntu 14.10 | KDE 4.14.1 | Thunderbird 38.0a2(Earlybird)
[Coexist - Understanding Across Divides](
https://www.coexist.org/)
Proofreader wanted - apply online. ;)