diff --git a/pkgs/by-name/li/librewolf-unwrapped/librewolf.nix b/pkgs/by-name/li/librewolf-unwrapped/librewolf.nix
index 86f8e1260ecd..4eaa532ebe08 100644
--- a/pkgs/by-name/li/librewolf-unwrapped/librewolf.nix
+++ b/pkgs/by-name/li/librewolf-unwrapped/librewolf.nix
@@ -1,4 +1,4 @@
-{ callPackage }:
+{ callPackage, runCommand }:
 let
   src = callPackage ./src.nix { };
 in
@@ -32,10 +32,6 @@ rec {
 
     sed -i '/# This must remain last./i gkrust_features += ["glean_disable_upload"]\'$'\n' toolkit/library/rust/gkrust-features.mozbuild
 
-    # Temporary fix used with patches/rust-build.patch
-    sed -i 's/9456ca46168ef86c98399a2536f577ef7be3cdde90c0c51392d8ac48519d3fae/60cd124908737068ab21c7773b3df71d00e186cd605f15bad9977232830aabc0/g' third_party/rust/encoding_rs/.cargo-checksum.json
-    sed -i 's/d7405d2bcf99cf9729075473c45f677630f4c1947c8ba9757db607f2025a7da2/a066ad881d5a74386e666fc844f7fecbbd70021d0330c1b08a2d7a2a67437ccf/g' third_party/rust/encoding_rs/.cargo-checksum.json
-
     cp ${source}/patches/pref-pane/category-librewolf.svg browser/themes/shared/preferences
     cp ${source}/patches/pref-pane/librewolf.css browser/themes/shared/preferences
     cp ${source}/patches/pref-pane/librewolf.inc.xhtml browser/components/preferences
@@ -55,7 +51,16 @@ rec {
     done
   '';
 
-  extraPrefsFiles = [ "${source}/settings/librewolf.cfg" ];
+  localSettingsPrefs = runCommand "local-settings.js" { } ''
+    # Import of `librewolf.cfg` file is already being done manually.
+    substitute ${source}/settings/defaults/pref/local-settings.js $out \
+      --replace-fail 'pref("general.config.filename", "librewolf.cfg");' ""
+  '';
+
+  extraPrefsFiles = [
+    "${source}/settings/librewolf.cfg"
+    localSettingsPrefs
+  ];
 
   extraPoliciesFiles = [ "${source}/settings/distribution/policies.json" ];
 
diff --git a/pkgs/by-name/li/librewolf-unwrapped/src.json b/pkgs/by-name/li/librewolf-unwrapped/src.json
index 9a43743f60aa..afde3b780190 100644
--- a/pkgs/by-name/li/librewolf-unwrapped/src.json
+++ b/pkgs/by-name/li/librewolf-unwrapped/src.json
@@ -1,11 +1,11 @@
 {
-  "packageVersion": "150.0.3-1",
+  "packageVersion": "151.0.1-2",
   "source": {
-    "rev": "150.0.3-1",
-    "hash": "sha256-ScwnfmK2zUFQLoy1Z9P9xQ2iTss2ufbzji/IHJSri9U="
+    "rev": "151.0.1-2",
+    "hash": "sha256-6C048VV6NECGTcdGla4qIa88z677ZTjORf5FM0a4xMM="
   },
   "firefox": {
-    "version": "150.0.3",
-    "hash": "sha512-hFLaYSAPjuZnkNP/8jDKhLKskpGvK1fgGEhsUPk4xTxvtJQ/5s/h6ZuXg0ZvsAv3B/oAYpN1OsaYYY/B47cKSg=="
+    "version": "151.0.1",
+    "hash": "sha512-hJKhu5VrODcxU5OL0YsOGOOkrQ0qvCAXtF4CvCdoyPRo1cBjKaMkhaA6Z7ucIhAuar/x5zCAx3dkc11DDcdydw=="
   }
 }