Firefox, as any other application, in KDE should use same global spell check (hunspell). At least as it works, for example, in Fedora. I install hunspell-en and some other languages and Firefox pickes them up it no dictionary list.
In openSuse 11.4 this system doesn't works, or i don't know how to make it work. Can anyne help out here.

PS i know i can just download Firefox dictionaries as addons, but this is not what i'm asking for.