diff --git a/apps/firefox/default.nix b/apps/firefox/default.nix
index b662666..79b4484 100644
--- a/apps/firefox/default.nix
+++ b/apps/firefox/default.nix
@@ -48,6 +48,17 @@
     set newtab about:newtab
   '';
 
+  xdg.mimeApps = {
+    enable = true;
+    defaultApplications = {
+      "text/html" = "firefox.desktop";
+      "x-scheme-handler/http" = "firefox.desktop";
+      "x-scheme-handler/https" = "firefox.desktop";
+      "x-scheme-handler/about" = "firefox.desktop";
+      "x-scheme-handler/unknown" = "firefox.desktop";
+    };
+  };
+
   programs.firefox = {
     enable = true;
     languagePacks = ["en-US"];