FIXED Address book search and auto-complete slowness introduced in Thunderbird 60.3.2.
Version 60.3.3 will prevent the loss of data affected users who have already upgraded to version 60.3.2 or earlier can restore the deleted ke圓.db file from backup to complete the migration. Thunderbird 60.3.2 and earlier contained a fault that potentially deleted saved passwords and private certificate keys for users using a master password.
MITIGATED Thunderbird 60 will migrate security databases (ke圓.db, cert8.db to key4.db, cert9.db).
FIXED New email not inserted in correct sort order in threaded unified view or search folder.
FIXED Spurious
(encoded newline) inserted into drafts and sent email.
FIXED Incorrect display of correspondents column since own email address was not always detected.
FIXED Inappropriate warning “Thunderbird prevented the site () from asking you to install software on your computer” when installing add-ons.
FIXED Body search/filtering didn't reliably ignore content of tags.
Now using date from “Received” header instead.
FIXED If the “Date” header of a message was invalid, Jan 1970 or Dec 1969 was displayed.
Messages are now always exported using the UTF-8 encoding.
FIXED Encoding problems when exporting address books or messages using the system charset.
FIXED Under some circumstances Thunderbird on Mac will send attachments using the so-called AppleDouble format which can lead to problems with mail servers and recipients.
FIXED Shutdown crash/hang after entering an empty IMAP password.
The SMTP LOGIN and POP3 USER/PASS authentication methods are now using a Latin-1 encoding again to work around this issue.
FIXED According to RFC 4616 and RFC 5721, passwords containing non-ASCII characters are encoded using UTF-8 which can lead to problems with non-compliant providers, for example.
FIXED Encoding problems for users (especially in Poland) when a file was sent via a folder using “Sent to > Mail recipient” due to a problem in the Thunderbird MAPI interface.
FIXED “Download rest of message” not working if global inbox was used.
FIXED Cookie removal (not working since Thunderbird version 52).
FIXED Double-clicking on a word in the Write window sometimes launched the Advanced Property Editor or Link Properties dialog.