This bug was fixed in the package thunderbird - 1:91.5.0+build1-0ubuntu0.20.04.1

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thunderbird (1:91.5.0+build1-0ubuntu0.20.04.1) focal; urgency=medium

  * New upstream stable release (91.5.0build1)

thunderbird (1:91.4.0+build2-0ubuntu0.20.04.1) focal; urgency=medium

  * New upstream stable release (91.4.0build2)

  [ Rico Tzschichholz ]
  * Bump dump_sys to bf7f6bd855eb6ecb233b52bfa7b2c975b7026540 (LP: #1945770)
    - debian/build/create-tarball.py

thunderbird (1:91.3.2+build1-0ubuntu0.20.04.1) focal; urgency=medium

  * New upstream stable release (91.3.2build1)

thunderbird (1:91.3.1+build1-0ubuntu0.20.04.1) focal; urgency=medium

  * New upstream stable release (91.3.1build1)

thunderbird (1:91.3.0+build2-0ubuntu0.20.04.3) focal; urgency=medium

  * Remove obsolete patch
    - debian/patches/s390x-workaround-sqlite3-clang-optimization-hang.patch

thunderbird (1:91.3.0+build2-0ubuntu0.20.04.2) focal; urgency=medium

  * Fix FTBFS on ppc64el (LP: #1930315)
    - debian/patches/ppc64el-clang10-no-fast-math.patch
  * Fix FTBFS on ppc64el
    - debian/patches/libpixman-disable-vmx.patch

thunderbird (1:91.3.0+build2-0ubuntu0.20.04.1) focal; urgency=medium

  * New upstream stable release (91.3.0build2) (LP: #1949605)
    - debian/config/branch.mk
  * Build with clang 13 where available, and drop clang 8
    - debian/build/rules.mk
    - debian/control{,.in}
  * Update the list of shipped locales (add Latvian)
    - debian/config/locales.{all,shipped}
  * Bump build dependency on rustc >= 1.51.0 and cargo >= 0.52
    - debian/control{,.in}
  * Bump build dependency on nodejs-mozilla >= 10.23.1
    - debian/control{,.in}
  * Bump build dependency on python3 >= 3.6
    - debian/control{,.in}
  * Remove build dependency on libgtk2.0-dev
    - debian/control{,.in}
  * Vendor dump_syms in the source tarball
    - debian/build/create-tarball.py
    - debian/build/rules.mk
    - debian/config/mozconfig.in
    - debian/control{,.in}
  * Update excludes list for the source tarball creation
    - debian/config/tarball.conf
  * Add packaging ignore options
    - debian/source/options
  * Remove the obsolete messagingmenu extension
    - debian/messagingmenu
    - debian/rules
    - debian/thunderbird.install.in
  * Update the default value of the extensions.autoDisableScopes preference and
    build with --with-unsigned-addon-scopes=app to continue allowing
    side-loading system-wide extensions (langpacks)
    - debian/vendor.js
    - debian/config/mozconfig.in
  * Stop building icudt67b.dat on s390x
    - debian/build/rules.mk
    - debian/control{,.in}
  * Build with MACH_USE_SYSTEM_PYTHON=1
    - debian/build/rules.mk
  * Build with thin LTO on armhf to work around OOM failures on Launchpad
    builders
    - debian/build/rules.mk
    - debian/patches/armhf-rustc-thin-lto.patch
  * Unconditionally reduce rustc's debuginfo level to 1 to prevent OOM failures
    on Launchpad builders (this affects all architectures)
    - debian/patches/reduce-rust-debuginfo.patch
  * Remove obsolete patches
    - debian/patches/armhf-disable-unaligned-fp-access-emulation.patch
    - debian/patches/reduce-rust-optlevel-on-ppc64el.patch
  * Update patches
    - armhf-reduce-linker-memory-use.patch
    - rust-drop-dll-checksums.patch
    - support-coinstallable-trunk-build.patch
  * Enable native Wayland support (LP: #1916469)
    - debian/thunderbird.sh.in
  * Fix non-fatal stracktrace in the apport hook (LP: #1943234)
    - debian/apport/source_thunderbird.py.in
  * Clean up obsolete gtk2-related exclusions
    - debian/build/rules.mk

 -- Olivier Tilloy <email address hidden>  Tue, 11 Jan 2022 17:33:06 +0100