diff --git a/nixos/modules/default.nix b/nixos/modules/default.nix
index 2d1dca6..aa2a856 100644
--- a/nixos/modules/default.nix
+++ b/nixos/modules/default.nix
@@ -57,6 +57,29 @@
       };
 
     };
+
+    xdg.mimeApps =
+      let
+        browser = "firefox.desktop";
+        image-viewer = "nsxiv.desktop";
+      in {
+      enable = true;
+
+      defaultApplications = {
+        "x-scheme-handler/http" = browser;
+        "x-scheme-handler/https" = browser;
+        "x-scheme-handler/chrome" = browser;
+        "text/html" = browser;
+        "application/x-extension-htm" = browser;
+        "application/x-extension-html" = browser;
+        "application/x-extension-shtml" = browser;
+        "application/xhtml+xml" = browser;
+        "application/x-extension-xhtml" = browser;
+        "application/x-extension-xht" = browser;
+        "image/jpeg" = image-viewer;
+        "image/png" = image-viewer;
+      };
+    };
   };
 
 }