Am 06.10.18 um 16:12 schrieb Johannes Rohr: > Now I tested the same profile on a recent Ubuntu with TB 52, and there > is no problem, so this seems to be a Debian specific issue, unrelated to > the user's configuration.
Yes and no. For me this is just indicating that this is not a problem of Thunderbird on Debian itself. Also comparing TB 52 with 60 doesn't say much. As long as you don't have any special setting in your profile settings Thunderbird is doing a "fallback' to the system defaults. You seems to have more problem of your global configuration. Please have a look at https://wiki.debian.org/HOWTO/DefaultWebBrowser Or you have some manual entries within your mimeTyps.rdf file within your profile somehow. Try $ thunderbird --fixmime But there shouldn't be anything as you say you can use the profile on another system. -- Regards Carsten Schoenert