We are issuing security releases across Thunderbird ESR 102 and Beta to address vulnerabilities that affected
#Matrix (which the Matrix team was quick to catch and patch!)
If you're using Matrix in Thunderbird, we recommend manually updating your Thunderbird client.
Context:
https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients(Please Boost for visibility)