Debian: firefox-esr Important Connection Errors Fix DSA-6003-2

Firefox 140.3.1 has been released, which fixes connection errors with
some sites; if HTTP/3 connections failed, the fallback is now handled
more gracefully.

For the oldstable distribution (bookworm), these problems have been fixed
in version 140.3.1esr-1~deb12u1.

For the stable distribution (trixie), these problems have been fixed in
version 140.3.1esr-1~deb13u1.

We recommend that you upgrade your firefox-esr packages.

For the detailed security status of firefox-esr please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/firefox-esr

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/