Thunderbird 78.7.0

Thunderbird

Thunderbird is a free, open-source, cross-platform application for managing email and news feeds. It is a local (rather than a web-based) email application that is powerful yet easy-to-use. Thunderbird is developed, tested, translated and supported by the folks at Mozilla Corporation and by a group of dedicated volunteers. Thunderbird gives you control and ownership over your email. There are lots of add-ons available for Thunderbird that enable you to extend and customize your email experience.

Thunderbird gives you IMAP/POP support, a built-in RSS reader, support for HTML mail, powerful quick search, saved search folders, advanced message filtering, message grouping, labels, return receipts, smart address book LDAP address completion, import tools, and the ability to manage multiple e-mail and newsgroup accounts.

What's new in Thunderbird 78.7.0:

Extension API: Compose API now supports editing messages and templates as new messages
Extension API: composeHtml is now exposed in MailIdentity
Extension API: windows.update and windows.create now support titlePreface
Extension API: new Accounts API functions: accounts.getDefault() and accounts.getDefaultIdentity(accountId)

Changes

Extension API: body and plainTextBody are now used as compose mode selectors in setComposeDetails and begin* functions in Compose API
Theme: removed the double border around the task description field on the Tasks tab

Fixes:

Account Manager: When deleting the last remaining account, the default account was not getting cleared and still pointed to the no-longer-existing account
OpenPGP: Verification of an inline signed message would fail if it contained leading whitespace
OpenPGP: Various other minor bug and stability fixes
Mail Window: Quickfilter bar buttons disappear when hovered on Windows 10 High Contrast Black theme
Theme: folder properties dialog contained black text on a black background in dark mode
Theme: recipient pills in compose window were not visible in high contrast dark theme on Windows 10
Extension API: browserAction buttons were not restored after restart if they were moved outside the default toolbar
Extension API: browser.compose.beginNew could not override identity plaintext setting
Extension API: browser.compose.beginForward was ignoring ComposeDetails
Extension API: browser.compose.setComposeDetails did not properly handle Windows-style line endings
Various security fixes