diff --git a/pkgs/by-name/sl/slimerjs/package.nix b/pkgs/by-name/sl/slimerjs/package.nix
deleted file mode 100644
index 09bb4dae87db..000000000000
--- a/pkgs/by-name/sl/slimerjs/package.nix
+++ /dev/null
@@ -1,53 +0,0 @@
-{
-  lib,
-  bash,
-  fetchFromGitHub,
-  firefox,
-  strip-nondeterminism,
-  stdenv,
-  unzip,
-  zip,
-}:
-
-stdenv.mkDerivation rec {
-  pname = "slimerjs";
-  version = "1.0.0";
-
-  src = fetchFromGitHub {
-    owner = "laurentj";
-    repo = "slimerjs";
-    sha256 = "sha256-RHd9PqcSkO9FYi5x+09TN7c4fKGf5pCPXjoCUXZ2mvA=";
-    rev = version;
-  };
-
-  buildInputs = [ zip ];
-  nativeBuildInputs = [
-    strip-nondeterminism
-    unzip
-  ];
-
-  preConfigure = ''
-    test -d src && cd src
-    test -f omni.ja || zip omni.ja -r */
-  '';
-
-  installPhase = ''
-    strip-nondeterminism --type zip omni.ja
-    mkdir -p "$out"/{bin,share/doc/slimerjs,lib/slimerjs}
-    cp LICENSE README* "$out/share/doc/slimerjs"
-    cp -r * "$out/lib/slimerjs"
-    echo '#!${bash}/bin/bash' >>  "$out/bin/slimerjs"
-    echo 'export SLIMERJSLAUNCHER=${firefox}/bin/firefox' >>  "$out/bin/slimerjs"
-    echo "'$out/lib/slimerjs/slimerjs' \"\$@\"" >> "$out/bin/slimerjs"
-    chmod a+x "$out/bin/slimerjs"
-    sed -e 's@MaxVersion=[3456][0-9][.]@MaxVersion=99.@' -i "$out/lib/slimerjs/application.ini"
-  '';
-
-  meta = with lib; {
-    description = "Gecko-based programmatically-driven browser";
-    mainProgram = "slimerjs";
-    license = licenses.mpl20;
-    maintainers = with maintainers; [ raskin ];
-    platforms = platforms.linux;
-  };
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index ec91cde37c60..1336ab9b5ff4 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -1214,6 +1214,7 @@ mapAliases {
   sky = throw "'sky' has been removed because its upstream website disappeared"; # Added 2024-07-21
   SkypeExport = skypeexport; # Added 2024-06-12
   slack-dark = throw "'slack-dark' has been renamed to/replaced by 'slack'"; # Converted to throw 2024-10-17
+  slimerjs = throw "slimerjs does not work with any version of Firefox newer than 59; upstream ended the project in 2021. <https://slimerjs.org/faq.html#end-of-development>"; # added 2025-01-06
   slurm-llnl = slurm; # renamed July 2017
   sm64ex-coop = throw "'sm64ex-coop' was removed as it was archived upstream. Consider migrating to 'sm64coopdx'"; # added 2024-11-23
   snapTools = throw "snapTools was removed because makeSnap produced broken snaps and it was the only function in snapTools. See https://github.com/NixOS/nixpkgs/issues/100618 for more details."; # 2024-03-04;