diff --git a/pkgs/applications/networking/browsers/firefox/common.nix b/pkgs/applications/networking/browsers/firefox/common.nix
index 687f4048e572..3816689f84ec 100644
--- a/pkgs/applications/networking/browsers/firefox/common.nix
+++ b/pkgs/applications/networking/browsers/firefox/common.nix
@@ -134,9 +134,6 @@ buildStdenv.mkDerivation ({
   lib.optional (lib.versionAtLeast version "90" && lib.versionOlder version "95") ./no-buildconfig-ffx90.patch ++
   lib.optional (lib.versionAtLeast version "96") ./no-buildconfig-ffx96.patch ++
 
-  # Fix wayland 1.20 compatibility (https://bugzilla.mozilla.org/show_bug.cgi?id=1745560:)
-  lib.optional (lib.versionOlder version "96") ./fix-build-with-wayland-1.20.patch ++
-
   patches;
 
   # Ignore trivial whitespace changes in patches, this fixes compatibility of
diff --git a/pkgs/applications/networking/browsers/firefox/fix-build-with-wayland-1.20.patch b/pkgs/applications/networking/browsers/firefox/fix-build-with-wayland-1.20.patch
deleted file mode 100644
index 49ce627faf54..000000000000
--- a/pkgs/applications/networking/browsers/firefox/fix-build-with-wayland-1.20.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/widget/gtk/mozwayland/mozwayland.c b/widget/gtk/mozwayland/mozwayland.c
-index 7a448e6..7792581 100644
---- a/widget/gtk/mozwayland/mozwayland.c
-+++ b/widget/gtk/mozwayland/mozwayland.c
-@@ -200,3 +200,8 @@ MOZ_EXPORT int wl_list_empty(const struct wl_list* list) { return -1; }
-
- MOZ_EXPORT void wl_list_insert_list(struct wl_list* list,
-                                     struct wl_list* other) {}
-+
-+MOZ_EXPORT struct wl_proxy *
-+wl_proxy_marshal_flags(struct wl_proxy *proxy, uint32_t opcode,
-+                      const struct wl_interface *interface, uint32_t version,
-+                      uint32_t flags, ...) { return NULL; }
diff --git a/pkgs/applications/networking/browsers/firefox/packages.nix b/pkgs/applications/networking/browsers/firefox/packages.nix
index 3bc3abe48ba1..0ae962f2551e 100644
--- a/pkgs/applications/networking/browsers/firefox/packages.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages.nix
@@ -32,10 +32,10 @@ rec {
 
   firefox-esr-91 = common rec {
     pname = "firefox-esr";
-    version = "91.5.1esr";
+    version = "91.6.0esr";
     src = fetchurl {
       url = "mirror://mozilla/firefox/releases/${version}/source/firefox-${version}.source.tar.xz";
-      sha512 = "26239e7a94b79f1e24a6667d7cf1c398d75992e8850144affbc5d3f34f04b91f0c9b020cab662b2cd4927924839ff2ddd2f3605c537bb5494fd9ac0d951b14fa";
+      sha512 = "3dd1929f93cdd087a93fc3597f32d9005c986b59832954e01a8c2472b179c92ad611eaa73d3fc000a08b838a0b70da73ff5ba82d6009160655ba6894cf04520e";
     };
 
     meta = {