Hi, the version available from unstable solves this issue for me (Buster, Xfce).
thunderbird: Installiert: 1:52.2.1-5 Installationskandidat: 1:52.2.1-5 Versionstabelle: *** 1:52.2.1-5 500 500 http://http.debian.net/debian unstable/main amd64 Packages 100 /var/lib/dpkg/status 1:52.2.1-4+b1 500 500 http://ftp.de.debian.org/debian buster/main amd64 Packages Regards, vinz. -- Xfce.space | skyrocket your desktop usage https://xfce.space