Although there is a version based on Debian (LMDE), Linux Mint it is based on Ubuntu. Canonical launched a new version of your operating system on October 14, and that was when Clement Lefebvre began to have almost all the pieces to create a new release of his that will arrive at the end of the year. Considering that there are two months to go, it is not surprising that the this month's note mention few things.
This November, "Clem" has dealt mainly with bug fixes in his note. For example, mention that many patches have been shipped from Linux Mint 20.2 to LMDE 4, from projects like cjs, cinnamon-screensaver, muffin, cinnamon, nemo, xapps, mintreport, and bulky. One of those patches caused a regression in muffin, something they are working on to correct as soon as possible.
Linux Mint Debian Edition 4 will upgrade Firefox 78 ESR to v94
On the other hand, Lefebvre ensures that they listen to, or more specifically read, their users on the blog, with whom the next versions of Xed (text editor) and Xreader (document viewer) will include a option to hide the menu bar. When hidden, the application uses less space and fits on lower resolution screens; by pressing the Alt key, the bar appears, but disappears when released. As for the editor, Xed can switch between open tabs using Ctrl + Tab and Ctrl + Shift + Tab.
The reporting tool will check systems to make sure everything matches (eg specs) and alerts users when this is not the case. And something that affects everyone, conservative or not, Firefox 78 ESR will go up to v94 browser. LMDE will no longer use the ESR version; it will use the same version as Linux Mint. Debian relies on the ESR version, but Lefebvre and his team must have thought that a long time goes by without new features, so they have switched to the stable or normal version.
As for the next version of the operating system, today they have not mentioned anything, but it is known that, as in previous years, will arrive for christmas.