diff --git a/users/profiles/firefox/default.nix b/users/profiles/firefox/default.nix
index a697737e..e7d93e3d 100644
--- a/users/profiles/firefox/default.nix
+++ b/users/profiles/firefox/default.nix
@@ -83,6 +83,10 @@
     "datareporting.healthreport.uploadEnabled" = false;
     "datareporting.healthreport.service.enabled" = false;
     "datareporting.policy.dataSubmissionEnabled" = false;
+    # Pipewire optimizations
+    # https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/Performance-tuning#firefox
+    "reader.parse-on-load.enabled" = false;
+    "media.webspeech.synth.enabled" = false;
   };
 
   # Override?