diff --git a/home/ivand/default.nix b/home/ivand/default.nix
index a015fee..38318d0 100644
--- a/home/ivand/default.nix
+++ b/home/ivand/default.nix
@@ -59,6 +59,19 @@
       publicShare = "${home.homeDirectory}/pub";
       music = "${home.homeDirectory}/mus";
     };
+    mimeApps = {
+      enable = true;
+      defaultApplications = {
+        "text/html" = "firefox-developer-edition.desktop";
+        "x-scheme-handler/http" = "firefox-developer-edition.desktop";
+        "x-scheme-handler/https" = "firefox-developer-edition.desktop";
+        "x-scheme-handler/about" = "firefox-developer-edition.desktop";
+        "x-scheme-handler/unknown" = "firefox-developer-edition.desktop";
+        "x-scheme-handler/mailto" = "userapp-Thunderbird-LDALA2.desktop";
+        "message/rfc822" = "userapp-Thunderbird-LDALA2.desktop";
+        "x-scheme-handler/mid" = "userapp-Thunderbird-LDALA2.desktop";
+      };
+    };
   };
 }