For notifications about changes to the MDN, please subscribe to our feed of released changes.
For more technical information about a change, click through from that feed entry to the Bugzilla ticket the entry is associated with. You can also follow our feed of all source code commits or watch this page for an overview of commits pushed to production.
All of these resources provide essentially the same information, just in slightly different formats.
Before February 2013
Before February, we recorded changes much more manually. If you are interested in these changes, please see the archive below.