diff --git a/pkgs/applications/networking/browsers/firefox/packages/firefox-beta.nix b/pkgs/applications/networking/browsers/firefox/packages/firefox-beta.nix
index a77441834596..cd821d6f21ef 100644
--- a/pkgs/applications/networking/browsers/firefox/packages/firefox-beta.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages/firefox-beta.nix
@@ -10,11 +10,11 @@
 buildMozillaMach rec {
   pname = "firefox-beta";
   binaryName = pname;
-  version = "140.0b9";
+  version = "141.0b2";
   applicationName = "Firefox Beta";
   src = fetchurl {
     url = "mirror://mozilla/firefox/releases/${version}/source/firefox-${version}.source.tar.xz";
-    sha512 = "eb63be9dd42f5f777706c15a87e536769deb22658da6c35070962d98d03ec678409a1d09bf257c0421039cccdf7db892eb4c7aee610341a262ffae28b04b52b3";
+    sha512 = "edbdc261c1c2cb3bcbe85cec81ec064da10955766dabb1580a38b5d07c5cf11904614ca61b5b09a176e9c618387d70eb41fbfd6deb178753b38c296f41a42431";
   };
 
   meta = {
diff --git a/pkgs/applications/networking/browsers/firefox/packages/firefox-devedition.nix b/pkgs/applications/networking/browsers/firefox/packages/firefox-devedition.nix
index 6c74ffcb3ea4..294c7063419f 100644
--- a/pkgs/applications/networking/browsers/firefox/packages/firefox-devedition.nix
+++ b/pkgs/applications/networking/browsers/firefox/packages/firefox-devedition.nix
@@ -10,13 +10,13 @@
 buildMozillaMach rec {
   pname = "firefox-devedition";
   binaryName = pname;
-  version = "141.0b1";
+  version = "141.0b2";
   applicationName = "Firefox Developer Edition";
   requireSigning = false;
   branding = "browser/branding/aurora";
   src = fetchurl {
     url = "mirror://mozilla/devedition/releases/${version}/source/firefox-${version}.source.tar.xz";
-    sha512 = "a849c601ce2076422d3f3cccfc74adbbf83c72805d7ec5ae336e3e4e2c6124a2853b3817589cf5779430784fe492b43bf8a4e48f6c7761d499e4b779f105d5a1";
+    sha512 = "90b20ecbc5a83f4dbf07a136f4d098800fd601aa486a3b48d19b63316f0c3a49704370f42975549b4fb26723796c8287ccb5b251d9e2c9ca6b5b1fa9db021109";
   };
 
   # buildMozillaMach sets MOZ_APP_REMOTINGNAME during configuration, but