diff --git a/configs/desktop-light.nix b/configs/desktop-light.nix
index 5c2827e..225cfba 100644
--- a/configs/desktop-light.nix
+++ b/configs/desktop-light.nix
@@ -92,6 +92,12 @@ ACTION=="add", SUBSYSTEM=="backlight", GROUP="video", MODE="0660"
     };
   };
 
+  xdg.mime.defaultApplications = {
+    "text/html" = "firefox.desktop";
+    "x-scheme-handler/http" = "firefox.desktop";
+    "x-scheme-handler/https" = "firefox.desktop";
+  };
+
   programs.dconf.enable = true;
   services.gvfs.enable = true;
 #  services.dunst.enable = true;