Note: While these templates will work for Firefox ESR 78, they contain new policies that are not in Firefox ESR 78. If you need to manage Firefox ESR 78, you should use v2.12
The README that corresponds to this release is:
https://github.com/mozilla/policy-templates/blob/v3.4/README.md
This release updates the following policies:
Bookmarks - The documentation has been clarified to explain how this policy can be used to remove all bookmarks. Also, a new item (Bookmarks (JSON)) was added to the ADMX template to allow doing this via GPO.
Cookies - A new option, Behavior, has been added replacing the existing options Default, AcceptThirdParty, and RejectTracker. This new option gives much better control over cookie behavior. Also a new option, BehaviorPrivateBrowsing, was also added to provide this same control when in private browsing.
FirefoxHome - Support has been added for removed sponsored top sites (SponsoredTopSites) and sponsored stories (SponsoredPocket).
Preferences - Added additional preferences keyword.enabled and toolkit.legacyUserProfileCustomizations.stylesheets.
For more information about Firefox 95 and Firefox 91.4 ESR, we now have enterprise release notes.
Also a special thanks to @pcanterino for updating the German translation.