Changelog:
new
Offer to configure Exchange accounts for Office365. A third-party add-on is required for this account type. IMAP still exists as alternative.
fixed
Edit tag not working
fixed
Write window: "Insert > Characters and Symbols" not working
fixed
Moving/dragging messages from "Search Messages" result dialog not working
fixed
Command line -compose "attachment=" not working
fixed
Custom views not working
fixed
Issues with list of content types/actions for incoming attachments
fixed
"Learn More" links in Error Console not working
fixed
Visual glitches: Quick Filter Bar tag buttons too tall, missing scroll
bar on Connection Setting subdialog, LDAP server selection after "New",
"Edit" and "Delete"
fixed
Calendar: Parts of CalDAV dialog not working
fixed
Various security fixes
Security fixes:
CVE-2019-11739: Covert Content Attack on S/MIME encryption using a crafted multipart/alternative message
#CVE-2019-11746: Use-after-free while manipulating video
#CVE-2019-11744: XSS by breaking out of title and textarea elements using innerHTML
#CVE-2019-11742: Same-origin policy violation with SVG filters and canvas to steal cross-origin images
#CVE-2019-11752: Use-after-free while extracting a key value in IndexedDB
#CVE-2019-11743: Cross-origin access to unload event attributes
#CVE-2019-11740: Memory safety bugs fixed in Firefox 69, Firefox ESR 68.1, Firefox ESR 60.9, Thunderbird 68.1, and Thunderbird 60.9
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