diff --git a/firefox.js b/firefox.js
index 1467f2d..1c3a8d6 100644
--- a/firefox.js
+++ b/firefox.js
@@ -36,3 +36,8 @@ user_pref("full-screen-api.transition.timeout", 0);
 
 // Remove some annoying animations (notably when going full screen)
 user_pref("toolkit.cosmeticAnimations.enabled", false);
+
+// Force-enable hardware compositing and WebRender.
+user_pref("layers.acceleration.force-enabled", true);
+user_pref("gfx.webrender.enabled", true);
+user_pref("gfx.webrender.all", true);