diff --git a/nix/homeModules/common/firefox.nix b/nix/homeModules/common/firefox.nix
index 556a528d..d479571b 100644
--- a/nix/homeModules/common/firefox.nix
+++ b/nix/homeModules/common/firefox.nix
@@ -129,15 +129,20 @@ in
     };
   };
 
-  xdg.mimeApps = lib.mkIf cfg.enable {
-    enable = true;
-    # source: https://unix.stackexchange.com/a/684582
-    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";
+  xdg.mimeApps =
+    let
+      # source: https://unix.stackexchange.com/a/684582
+      associations = {
+        "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";
+      };
+    in
+    lib.mkIf cfg.enable {
+      enable = true;
+      associations.added = associations;
+      defaultApplications = associations;
     };
-  };
 }