diff --git a/pkgs/applications/networking/browsers/firefox/packages.nix b/pkgs/applications/networking/browsers/firefox/packages.nix
index a0914d5dcb92..42ebf58daf15 100644
--- a/pkgs/applications/networking/browsers/firefox/packages.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages.nix
@@ -56,12 +56,12 @@ rec {
 
   firefox-devedition = buildMozillaMach rec {
     pname = "firefox-devedition";
-    version = "112.0b8";
+    version = "112.0b9";
     applicationName = "Mozilla Firefox Developer Edition";
     branding = "browser/branding/aurora";
     src = fetchurl {
       url = "mirror://mozilla/devedition/releases/${version}/source/firefox-${version}.source.tar.xz";
-      sha512 = "a77504bd80022bd0c908d2c6b59781f0d71d65e92be001bce993935b6a55775369bf36829c2979912f4d920e29e63c043b93c5e932669674ff47140e13a9519f";
+      sha512 = "d798803dca258007d355a181263b803365a13385a1bc09bdada07336add019bd36db197cdfa3749240f563641167a9d9e5c0539e58ecd369f575a219a4064b74";
     };
 
     meta = {