firefox in the LiveCD of altlinux-5.0.0-kdesktop-i586-ru-install-dvd5.iso I booted the LiveCD, downloaded a file in Firefox, then right-clicked on the downloaded file in the list of downloads, selected "open the containing folder", and Firefox said that there is no program associated with the type "File". I suggest to make so that in KDE4 there is such an association with the KDE4's file manager ("dolphin", I assume).
В p8 не воспроизводится.