diff --git a/images/docker-firefox.md b/images/docker-firefox.md
index 5a10f87cdf..96fe096942 100755
--- a/images/docker-firefox.md
+++ b/images/docker-firefox.md
@@ -162,5 +162,6 @@ We publish various [Docker Mods](https://github.com/linuxserver/docker-mods) to
 
 ## Versions
 
+* **23.12.21:** - Rebase to Alpine 3.15, stop using ESR.
 * **26.09.21:** - Rebase to Alpine 3.14.
 * **19.04.21:** - Initial release.