diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index b339154ad8a1..a7e6f9cf9036 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -488,10 +488,6 @@ in
     imports = [ ./firefox.nix ];
     _module.args.firefoxPackage = pkgs.firefox-esr;
   };
-  firefox-esr-128 = runTest {
-    imports = [ ./firefox.nix ];
-    _module.args.firefoxPackage = pkgs.firefox-esr-128;
-  };
   firefox-esr-140 = runTest {
     imports = [ ./firefox.nix ];
     _module.args.firefoxPackage = pkgs.firefox-esr-140;
diff --git a/pkgs/applications/networking/browsers/firefox/packages/firefox-esr-128.nix b/pkgs/applications/networking/browsers/firefox/packages/firefox-esr-128.nix
deleted file mode 100644
index 96719a7734ed..000000000000
--- a/pkgs/applications/networking/browsers/firefox/packages/firefox-esr-128.nix
+++ /dev/null
@@ -1,40 +0,0 @@
-{
-  stdenv,
-  lib,
-  callPackage,
-  fetchurl,
-  nixosTests,
-  buildMozillaMach,
-}:
-
-buildMozillaMach rec {
-  pname = "firefox";
-  version = "128.13.0esr";
-  applicationName = "Firefox ESR";
-  src = fetchurl {
-    url = "mirror://mozilla/firefox/releases/${version}/source/firefox-${version}.source.tar.xz";
-    sha512 = "9e6f3af535e0904219bcac947d458789cc43cbfaf476ac287328323662391eaaadeff57b244599acf3626a2fadc0bc41b70d07e33ca6af4412006ad01ceff034";
-  };
-
-  meta = {
-    changelog = "https://www.mozilla.org/en-US/firefox/${lib.removeSuffix "esr" version}/releasenotes/";
-    description = "Web browser built from Firefox source tree";
-    homepage = "http://www.mozilla.com/en-US/firefox/";
-    maintainers = with lib.maintainers; [ hexa ];
-    platforms = lib.platforms.unix;
-    broken = stdenv.buildPlatform.is32bit;
-    # since Firefox 60, build on 32-bit platforms fails with "out of memory".
-    # not in `badPlatforms` because cross-compilation on 64-bit machine might work.
-    maxSilent = 14400; # 4h, double the default of 7200s (c.f. #129212, #129115)
-    license = lib.licenses.mpl20;
-    mainProgram = "firefox";
-  };
-  tests = {
-    inherit (nixosTests) firefox-esr-128;
-  };
-  updateScript = callPackage ../update.nix {
-    attrPath = "firefox-esr-128-unwrapped";
-    versionPrefix = "128";
-    versionSuffix = "esr";
-  };
-}
diff --git a/pkgs/applications/networking/mailreaders/thunderbird/packages.nix b/pkgs/applications/networking/mailreaders/thunderbird/packages.nix
index eadf28ea4291..71f7c570700f 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird/packages.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird/packages.nix
@@ -94,8 +94,8 @@ rec {
   thunderbird = thunderbird-latest;
 
   thunderbird-latest = common {
-    version = "141.0";
-    sha512 = "cd747c0831532f90685975567102d1bdb90a780e21209fe4b7bddf2d84ac88576766706e95e22043a30a8a89b6d3daffb56a68c3ccc4a300b8236b20d4fca675";
+    version = "142.0";
+    sha512 = "9a871846fc395c69688310dbf4a4569b75d3b2952a34ba1f7dc9ef5a60a34bd740087b4abb2a1a4d522dfa9d6640f2f4fcc9972a2b72160d1ed3e0df71c2901c";
 
     updateScript = callPackage ./update.nix {
       attrPath = "thunderbirdPackages.thunderbird-latest";
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index da7ca3946cb1..63cc7bf45a80 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -654,6 +654,8 @@ mapAliases {
   firefox-devedition-bin = lib.warnOnInstantiate "`firefox-devedition-bin` is removed.  Please use `firefox-devedition` or `firefox-bin` instead." firefox-devedition;
   firefox-esr-115 = throw "The Firefox 115 ESR series has reached its end of life. Upgrade to `firefox-esr` or `firefox-esr-128` instead.";
   firefox-esr-115-unwrapped = throw "The Firefox 115 ESR series has reached its end of life. Upgrade to `firefox-esr-unwrapped` or `firefox-esr-128-unwrapped` instead.";
+  firefox-esr-128 = throw "The Firefox 128 ESR series has reached its end of life. Upgrade to `firefox-esr` or `firefox-esr-140` instead.";
+  firefox-esr-128-unwrapped = throw "The Firefox 128 ESR series has reached its end of life. Upgrade to `firefox-esr-unwrapped` or `firefox-esr-140-unwrapped` instead.";
   firefox-wayland = firefox; # Added 2022-11-15
   firmwareLinuxNonfree = linux-firmware; # Added 2022-01-09
   fishfight = jumpy; # Added 2022-08-03
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b0db51af973f..0769a485f735 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -12482,18 +12482,6 @@ with pkgs;
           buildMozillaMach
           ;
       };
-  firefox-esr-128-unwrapped =
-    import ../applications/networking/browsers/firefox/packages/firefox-esr-128.nix
-      {
-        inherit
-          stdenv
-          lib
-          callPackage
-          fetchurl
-          nixosTests
-          buildMozillaMach
-          ;
-      };
   firefox-esr-140-unwrapped =
     import ../applications/networking/browsers/firefox/packages/firefox-esr-140.nix
       {
@@ -12514,11 +12502,6 @@ with pkgs;
 
   firefox-mobile = callPackage ../applications/networking/browsers/firefox/mobile-config.nix { };
 
-  firefox-esr-128 = wrapFirefox firefox-esr-128-unwrapped {
-    nameSuffix = "-esr";
-    wmClass = "firefox-esr";
-    icon = "firefox-esr";
-  };
   firefox-esr-140 = wrapFirefox firefox-esr-140-unwrapped {
     nameSuffix = "-esr";
     wmClass = "firefox-esr";