diff --git a/pkgs/applications/networking/browsers/firefox/packages.nix b/pkgs/applications/networking/browsers/firefox/packages.nix
index 4823ceab0eac..6e2642d4e0ea 100644
--- a/pkgs/applications/networking/browsers/firefox/packages.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages.nix
@@ -3,10 +3,10 @@
 {
   firefox = buildMozillaMach rec {
     pname = "firefox";
-    version = "125.0.3";
+    version = "126.0";
     src = fetchurl {
       url = "mirror://mozilla/firefox/releases/${version}/source/firefox-${version}.source.tar.xz";
-      sha512 = "18e705a3093290311ccb5f27f01e43fe243ece94c1769a9ccc4fa53d370e32a1ec6a107cdeb531e9468b9aca1a1fe668161adb7acc1ec65fd383837882c7d484";
+      sha512 = "56025b051d544ca294911a1d6a66f09945f71012131881b64313dafb579730810a4b091950c90a21d4fd3f393ba23670d8409086e1677d80d0bbbe347c303527";
     };
 
     extraPatches = [