diff --git a/hosts/neodymium/home/default.nix b/hosts/neodymium/home/default.nix
index 3f9a7d4..1ce0d5c 100644
--- a/hosts/neodymium/home/default.nix
+++ b/hosts/neodymium/home/default.nix
@@ -12,5 +12,6 @@
     ./shell
     ./vscode
     ./wayland
+    ./xdg
   ];
 }
diff --git a/hosts/neodymium/home/xdg/default.nix b/hosts/neodymium/home/xdg/default.nix
new file mode 100644
index 0000000..24a3f0f
--- /dev/null
+++ b/hosts/neodymium/home/xdg/default.nix
@@ -0,0 +1,36 @@
+{ ... }: {
+  xdg.mimeApps = {
+    enable = true;
+
+    defaultApplications = {
+      # librewolf
+      "text/html" = "librewolf.desktop";
+      "x-scheme-handler/http" = "librewolf.desktop";
+      "x-scheme-handler/https" = "librewolf.desktop";
+      "x-scheme-handler/about" = "librewolf.desktop";
+      "x-scheme-handler/unknown" = "librewolf.desktop";
+      "application/pdf" = "librewolf.desktop";
+      "image/png" = "librewolf.desktop";
+      "image/jpeg" = "librewolf.desktop";
+      "image/gif" = "librewolf.desktop";
+
+      # vscode
+      "text/plain" = "code.desktop";
+      "text/x-python" = "code.desktop";
+      "application/json" = "code.desktop";
+      "application/yaml" = "code.desktop";
+      "application/xml" = "code.desktop";
+      "application/javascript" = "code.desktop";
+      "text/css" = "code.desktop";
+
+      # mpv
+      "video/mpeg" = "mpv.desktop";
+      "video/mp4" = "mpv.desktop";
+      "video/x-matroska" = "mpv.desktop";
+
+      # thunderbird
+      "text/calendar" = "thunderbird.desktop";
+      "text/x-vcard" = "thunderbird.desktop";
+    };
+  };
+}