* several fixes as outlined here
https://www.thunderbird.net/en-US/thunderbird/91.4.0/releasenotes
MFSA 2021-54 (bsc#1193485)
* CVE-2021-43536 (bmo#1730120)
URL leakage when navigating while executing asynchronous
function
* CVE-2021-43537 (bmo#1738237)
Heap buffer overflow when using structured clone
* CVE-2021-43538 (bmo#1739091)
Missing fullscreen and pointer lock notification when
requesting both
* CVE-2021-43539 (bmo#1739683)
GC rooting failure when calling wasm instance methods
* CVE-2021-43541 (bmo#1696685)
External protocol handler parameters were unescaped
* CVE-2021-43542 (bmo#1723281)
XMLHttpRequest error codes could have leaked the existence of
an external protocol handler
* CVE-2021-43543 (bmo#1738418)
Bypass of CSP sandbox directive when embedding
* CVE-2021-43545 (bmo#1720926)
Denial of Service when using the Location API in a loop
* CVE-2021-43546 (bmo#1737751)
Cursor spoofing could overlay user interface when native
cursor is zoomed
* CVE-2021-43528 (bmo#1742579)
JavaScript unexpectedly enabled for the composition area
* MOZ-2021-0009 (bmo#1393362, bmo#1736046, bmo#1736751,
bmo#1737009, bmo#1739372, bmo#1739421)
OBS-URL: https://build.opensuse.org/package/show/mozilla:Factory/MozillaThunderbird?expand=0&rev=617
a14190f4f1