- Mozilla Thunderbird 91.2.0
  * Saving a single message as .eml now uses a unique filename
  * New mail notifications did not properly take subfolders into account
  * Decrypting binary attachments when using an external GnuPG
    configuration failed
  * Account name fields in the account manager were not big enough
    for long names
  * LDAP searches using an extensibleMatch filter returned no results
  * Read-only CalDAV calendars and CardDAV address books were not detected
  * Multipart messages containing a calendar invite did not display
    any of the human-readable alternatives
  * Some calendar days were displayed incorrectly or duplicated
    (eg. two "29th" days of a particular month)
  * Phantom event was shown at the end of each day in Calendar week view
  MFSA 2021-46 (bsc#1191332)
  * CVE-2021-38496 (bmo#1725335)
    Use-after-free in MessageTask
  * CVE-2021-38497 (bmo#1726621)
    Validation message could have been overlaid on another origin
  * CVE-2021-38498 (bmo#1729642)
    Use-after-free of nsLanguageAtomService object
  * CVE-2021-32810 (bmo#1729813,
    https://github.com/crossbeam-
    rs/crossbeam/security/advisories/GHSA-pqqp-xmhj-wgcw)
    Data race in crossbeam-deque
  * CVE-2021-38500 (bmo#1725854, bmo#1728321)
    Memory safety bugs fixed in Firefox 93, Firefox ESR 78.15,
    and Firefox ESR 91.2
  * CVE-2021-38501 (bmo#1685354, bmo#1715755, bmo#1723176)
    Memory safety bugs fixed in Firefox 93 and Firefox ESR 91.2

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