diff --git a/pkgs/applications/networking/browsers/firefox/10.0.nix b/pkgs/applications/networking/browsers/firefox/10.0.nix
index 79869b324b9..3a688cb6669 100644
--- a/pkgs/applications/networking/browsers/firefox/10.0.nix
+++ b/pkgs/applications/networking/browsers/firefox/10.0.nix
@@ -15,14 +15,14 @@ assert stdenv.gcc ? libc && stdenv.gcc.libc != null;
 
 rec {
 
-  firefoxVersion = "10.0";
+  firefoxVersion = "10.0.1";
   
-  xulVersion = "10.0"; # this attribute is used by other packages
+  xulVersion = "10.0.1"; # this attribute is used by other packages
 
   
   src = fetchurl {
     url = "http://releases.mozilla.org/pub/mozilla.org/firefox/releases/${firefoxVersion}/source/firefox-${firefoxVersion}.source.tar.bz2";
-    sha1 = "cbf1fb0efe0a3a2b2dafaa324b136736e93de70c";
+    sha1 = "8613957db84e6722ccf1ebf74fab927139614bfc";
   };
   
   commonConfigureFlags =
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index bffaaa00281..88101ecf295 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6840,7 +6840,7 @@ let
 
   firefoxWrapper = wrapFirefox { browser = pkgs.firefox; };
 
-  firefoxPkgs = pkgs.firefox90Pkgs;
+  firefoxPkgs = pkgs.firefox100Pkgs;
 
   firefox36Pkgs = callPackage ../applications/networking/browsers/firefox/3.6.nix {
     inherit (gtkLibs) gtk pango;