diff --git a/pkgs/applications/networking/browsers/firefox/common.nix b/pkgs/applications/networking/browsers/firefox/common.nix
index 5950f5d9845a..e1506239f457 100644
--- a/pkgs/applications/networking/browsers/firefox/common.nix
+++ b/pkgs/applications/networking/browsers/firefox/common.nix
@@ -19,7 +19,6 @@
 
 { lib
 , stdenv
-, fetchpatch
 
 # build time
 , autoconf
@@ -178,14 +177,6 @@ buildStdenv.mkDerivation ({
   ];
 
   patches = [
-    (fetchpatch {
-      # RDD Sandbox paths for NixOS, remove with Firefox>=100
-      # https://hg.mozilla.org/integration/autoland/rev/5ac6a69a01f47ca050d90704a9791b8224d30f14
-      # https://bugzilla.mozilla.org/show_bug.cgi?id=1761692
-      name = "mozbz-1761692-rdd-sandbox-paths.patch";
-      url = "https://hg.mozilla.org/integration/autoland/raw-rev/5ac6a69a01f47ca050d90704a9791b8224d30f14";
-      hash = "sha256-+NGRUxXA7HGvPaAwvDveqRsdXof5nBIc+l4hdf7cC/Y=";
-    })
   ]
   ++ lib.optional (lib.versionAtLeast version "86") ./env_var_for_system_dir-ff86.patch
   ++ lib.optional (lib.versionAtLeast version "90" && lib.versionOlder version "95") ./no-buildconfig-ffx90.patch
diff --git a/pkgs/applications/networking/browsers/firefox/packages.nix b/pkgs/applications/networking/browsers/firefox/packages.nix
index d52ec29abcf8..17c581882b8a 100644
--- a/pkgs/applications/networking/browsers/firefox/packages.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages.nix
@@ -7,10 +7,10 @@ in
 rec {
   firefox = common rec {
     pname = "firefox";
-    version = "99.0.1";
+    version = "100.0";
     src = fetchurl {
       url = "mirror://mozilla/firefox/releases/${version}/source/firefox-${version}.source.tar.xz";
-      sha512 = "0006b773ef1057a6e0b959d4f39849ad4a79272b38d565da98062b9aaf0effd2b729349c1f9fa10fccf7d2462d2c536b02c167ae6ad4556d6e519c6d22c25a7f";
+      sha512 = "29c56391c980209ff94c02a9aba18fe27bea188bdcbcf7fe0c0f27f61e823f4507a3ec343b27cb5285cf3901843e9cc4aca8e568beb623c4b69b7282e662b2aa";
     };
 
     meta = {