diff --git a/home-manager/programs/firefox.nix b/home-manager/programs/firefox.nix
index f3f0ce9..444363d 100644
--- a/home-manager/programs/firefox.nix
+++ b/home-manager/programs/firefox.nix
@@ -1,5 +1,15 @@
 #{ pkgs-unstable, ... }: {
 { ... }: {
+  xdg = {
+    enable = true;
+    mimeApps = {
+      enable = true;
+      defaultApplications = {
+        "application/pdf" = "firefox.desktop";
+      };
+    };
+  };
+
   programs.firefox = {
     enable = true;
     #package = pkgs-unstable.firefox;