Beta Notes

Unified folders now display account color indicator with account name tooltip

Added Proton Mail key server and WKD key discovery for Proton domains

OAuth login for mail accounts now opens in default web browser

Thundermail services can now be used without installing an add-on

OAuth responses now verify issuer fields and reject missing required issuers

Removed Odnoklassniki chat setup and directed users to XMPP configuration

Ctrl+S did not save PDF attachments opened in Thunderbird tabs

TLS errors incorrectly reported all unknown failures as untrusted certificates

Thunderbird could crash during shutdown

Old IMAP profile migration deleted INBOX and other mailbox files

Space bar did not scroll in PDF attachments opened from emails

'Search Messages' shortcut (Ctrl+Shift+F) failed in standalone message window

Folder location widget used non-localised name

Empty confirmation dialog when more messages opened in tabs than mailnews.open_tab_warning

Removing tags from IMAP messages could fail and tags reappeared after refresh

Global search failed to display inaccessible messages found in local folders

Numeric subfolders were sorted alphabetically instead of naturally

Virtual folder folder-picker showed unlabeled IM account as selectable folder

Apple Mail OpenPGP emails failed to decrypt due to hidden recipient key ID

OpenPGP import of public key with experimental packets failed with unclear error

Performance issue when decrypting encrypted messages

Opening messages with OpenPGP keys was slow and blocked the UI for large keyrings

OpenPGP key refresh failed when fingerprint lookup returned multiple results

Invalid S/MIME encryption certificate caused misleading send errors

Esc cleared quick filter pin after changing folder

Dragging email address between compose windows failed to add recipients

Thunderbird could crash when using Find and Replace All

Compose window remained open when delayed sending was enabled

Account hub showed connection security instead of actual authentication method

Account Hub GSSAPI autoconfiguration incorrectly prompted for a password

New identity dialog lacked reply-matching and end-to-end encryption settings

Account Hub manual EWS setup lacked OAuth authentication option

Thunderbird could fail to shut down cleanly during active OAuth requests

Account Hub kept OAuth selected after changing to hostname without OAuth support

Account Hub showed a false error when returning from EWS manual configuration

Account Hub autodetect wrongly prompted for a password when auth was unavailable

Redirected CardDAV URLs resolved relative URLs against the wrong host

Auto-compaction could corrupt database and cause crashes during syncs

NNTP server with invalid TLS certificate could not be added to certificate exceptions

Sent message in EWS account showed message as unread in the sent items folder

EWS NTLM authentication triggered login failures despite successful syncs

Saving inline Exchange images used incorrect filenames and file types

Cancelled message send could not be retried and hung with SMTP timeout errors

EWS folders failed to show new mail notifications until the folder was selected

Corrupted NNTP account data caused excessive memory use and startup crash

Multiple selected IMAP folders could not be moved or deleted together

Non-Latin IMAP keywords were lowercased and encoded incorrectly as MUTF-7

Message tags were lost when moving folder from local folder to IMAP folder

Removing a chat account threw an exception and failed to clear the UI

Calendar invites were incorrectly marked processed after calendar sync completed

ICS event comments were not displayed in Thunderbird event details

Visual and UX improvements

Enable the "Sign in with Thundermail" button in Account Hub

Update Thundermail system add-on to 1.9.0 and additional fixes

Interrupted external OAuth2 setup required restarting Thunderbird

Account Hub OAuth setup for Yahoo could hang after sign-in and never complete