Hi all, here are some suggestions from a user who tried to set up a new profile and migrated his data into it. I don't know whether Import/Export tools can handle address books. Interesting reading is also https://bugzilla.mozilla.org/show_bug.cgi?id=584014#c85 about a function to "refresh" a profile in case it got somehow corrupted. We might want to consider some of the items for future planning. Jörg. On 09 Jan 2020 08:50, Bugzilla@Mozilla wrote: > https://bugzilla.mozilla.org/show_bug.cgi?id=177175 > > Incidentally, in the experience I have learnt the following items: > > - trying to reuse past address books mab files with the addressbooksynchronizer > extension is error prone. It gave me errors in importing one of the mab files. > I had to export it as CSV and re-import the addresses. In this way all the > mailing lists are lost, and I had to export them individually as CSV files, > which was a real pain. I really think that TB should learn to export/import > its address books in some JSON or YAML format preserving the mailing lists. > > - There is no easy way to export/import an email account configuration. TB > should learn to export/import account configuration in some structured text > format (JSON or YAML). > > - Creating new email accounts from scratch, they get set up with the "Keep > messages in all folders for this account on this computer" and "Syncronize all > messages locally regardless of age". IMHO this is looking for trouble. > Downloading many GBs of messages from each account quicly filled my disk > blocking my machine and risking data loss. I think that TB should default to > only sync locally /recent/ messages on IMAP accounts. The issue is made worse > by the fact that when you change the setup TB does not reclaim the space. >