diff --git a/home-manager/modules/firefox/default.nix b/home-manager/modules/firefox/default.nix
index dda07de..059b421 100644
--- a/home-manager/modules/firefox/default.nix
+++ b/home-manager/modules/firefox/default.nix
@@ -16,6 +16,7 @@ let
     "security.tls.enable_0rtt_data" = false;
     "media.ffmpeg.vaapi.enabled" = true;
     "media.rdd-ffmpeg.enabled" = true;
+    "network.http.http3.enabled" = false; # Temporary workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=1749908
   };
 
   nonDefaultDesktop = pkgs.makeDesktopItem {