diff -r 7e26c7da4463 -r 141e0f1194b1 widget/xpwidgets/nsTransferable.cpp
--- a/widget/xpwidgets/nsTransferable.cpp	Wed Dec 31 06:55:50 2014 +0100
+++ b/widget/xpwidgets/nsTransferable.cpp	Wed Dec 31 07:16:47 2014 +0100
@@ -58,7 +58,6 @@
 void
 DataStruct::SetData ( nsISupports* aData, uint32_t aDataLen )
 {
-#if 0  // Remove unnecessary disk caching to accommodate https://www.torproject.org/projects/torbrowser/design/#disk-avoidance
   // Now, check to see if we consider the data to be "too large"
   if (aDataLen > kLargeDatasetSize) {
     // if so, cache it to disk instead of memory
@@ -67,7 +66,6 @@
     else
 			NS_WARNING("Oh no, couldn't write data to the cache file");   
   } 
-#endif  // #if 0
 
   mData    = aData;
   mDataLen = aDataLen;