On Tuesday 21 July 2015 20:49:02 Baron wrote: Dear Baron, 1] Try to change in the Iceweasel's mail's link configuration, by another MUA (as Claws-mail or Dovecot...). Maybe, if you choosed kmail in Iceweasel's configuration, could make Iceweasel angry, but why ? there is no reason. 2] Did you open Iceweasel in a Konsole to see the messages ? : $ iceweasel -safe_mode and test if Kmail opens normally. or $ iceweasel and reads the message... as "segmentation error"... If yes (or even no) : 3] Remove (--purge) completely Kmail and Iceweasel, and reinstall them. Remove your directory ~.mozilla and the extensions, plugins as Flashplayer, before remove it. (try to save your datas before, some of them must be important !). In my system, Iceweasel closed suddenly. It's what I did, as described above, doesn't matter with the datas, and now Iceweasel works fine without closing all of a sudden. But my couple iceweasel - kmail always worked good together. Hope it helps ! André