https://bugs.kde.org/show_bug.cgi?id=379901
--- Comment #6 from Kai Uwe Broulik <k...@privat.broulik.de> --- It is. Please provide your ~/.config/mimeapps.list I can confirm that changing the setting doesn't work here, it writes into [Default Applications] but Thunderbird set itself to [Added Associations] -- You are receiving this mail because: You are watching all bug changes.