Comment # 4 on bug 1180413 from Fabian Vogt

(In reply to Christopher Yeleighton from comment #0)
> { kioclient5 exec 'info:diffutils'; }
>  => handbook (OK but useless,
>  internal links do not work in Firefox ��������� info: unknown protocol)

That's expected, the info: protocol is a KIO feature and Firefox does not use
KIO.

> KDE Help directory
>  => no diffutils (bad!)

What do you mean by that? If I open KHelpCenter, I can navigate to the
diffutils info page just fine.