Comment 22 for bug 222635

> If not, you're on your own (it's pretty much undefined:
> probably best to just assume ISO-8859-1 as now).

I don't think we can make such an assumption for this
type of situation. It would have to be the same encoding as
the system default or the browser window endcoding to be
safe.

If we pay attention to both LANG and encoding (=UTF-8),
I think we need to use the proper font for the LANG
value to display the result. Hope this is automatically
done the the layout and rendering components of Mozilla.