Hi,

> On my daugther's notebook, if I select Edit - Settings in Firefox,
> nothing happens. The Settings window just doesn't appear.
> I've already reinstalled Firefox from the FTP repository
> but that didn't help.

what does ~/.mozilla/firefox say? Consider renaming the old
~/.mozilla/firefox folder, run Ff (it recreates the configs automatically
from a skeleton) and copy-paste the old bookmarks, etc to the newly created
firefox config directory.

BTW, reinstalling Ff does _not_ delete the old configs! You have to do this
by hand (as described above).

Hope it was of assistance.