diff --git a/lib/torque/core.js b/lib/torque/core.js
index 8dbc481..f27f5ed 100644
--- a/lib/torque/core.js
+++ b/lib/torque/core.js
@@ -76,7 +76,7 @@
   }
 
   var flags = {
-    sprites_to_images: userAgent().indexOf('Safari') === -1
+    sprites_to_images: userAgent().indexOf('Safari') === -1 && userAgent().indexOf('Firefox') === -1
   };
 
 module.exports = {