diff --git a/modules/nixos/apps/firefox/default.nix b/modules/nixos/apps/firefox/default.nix
index c7a592c..339fcf9 100644
--- a/modules/nixos/apps/firefox/default.nix
+++ b/modules/nixos/apps/firefox/default.nix
@@ -12,5 +12,16 @@ in {
     enable = mkEnableOption "firefox";
   };
 
-  config = mkIf cfg.enable {environment.systemPackages = with pkgs; [firefox];};
+  config = mkIf cfg.enable {
+    environment.systemPackages = with pkgs; [firefox];
+    aa.home.extraOptions = {
+      xdg.mimeApps.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";
+      };
+    };
+  };
 }
diff --git a/modules/nixos/home/default.nix b/modules/nixos/home/default.nix
index 637f035..de662a0 100644
--- a/modules/nixos/home/default.nix
+++ b/modules/nixos/home/default.nix
@@ -40,9 +40,11 @@ in {
     aa.home.extraOptions = {
       home.stateVersion = config.system.stateVersion;
       home.file = mkAliasDefinitions options.aa.home.file;
-      xdg.enable = true;
-      xdg.configFile = mkAliasDefinitions options.aa.home.configFile;
-      xdg.dataFile = mkAliasDefinitions options.aa.home.dataFile;
+      xdg = {
+        enable = true;
+        configFile = mkAliasDefinitions options.aa.home.configFile;
+        dataFile = mkAliasDefinitions options.aa.home.dataFile;
+      };
     };
 
     home-manager = {