a corrective update of the previous Debian 9 stable branch, which includes backlog of package updates and fixes bugs in the installer. The release includes 75 stability updates and 73 security updates. This is the final release of the Debian 9 branch, further preparation of package updates will be handed over to the team . Regular support for Debian 9 ended on July 18, 2020. As part of the LTS branch, updates for Debian 9 will be released until June 30, 2022.
Of the changes in Debian 9.13, 22 packages were removed, including the removal of enigmail, pdns-recursor, yahoo2mbox, weboob, torbirdy, simpleid, profphd, mathematica-fonts, libmicrodns, kerneloops, gplaycli, getlive, dynalogin, colorediffs-extension, certificatepatrol.
Firefox-esr has also been discontinued for the armel, mips, mipsel and mips64el architectures.
To download and install "from scratch" within a few hours will be prepared and c Debian 9.13. Previously installed and up-to-date systems receive the updates that are present in Debian 10.3 through the native update system. Security fixes included in new releases of Debian are made available to users as updates are released via the security.debian.org service.
Source: opennet.ru