Review for ImportExportTools by John S 1001
Rated 5 out of 5 stars
I'd deleted my tesco mailboxes (as Tesco no longer provide email or web services), foolishly deleting the associated archives. This tool worked perfectly for me and recovered them from my profile folder.
ps was running version 59. Just updated to 60.3, add-on still visible and not showing incompatibility
To create your own collections, you must have a Mozilla Add-ons account.