--- a/image/src/DiscardTracker.cpp
+++ b/image/src/DiscardTracker.cpp
@@ -123,22 +123,18 @@ DiscardTracker::DiscardAll()
   DisableTimer();
 }
 
 void
 DiscardTracker::InformAllocation(PRInt64 bytes)
 {
   // This function is called back e.g. from RasterImage::Discard(); be careful!
 
-  sCurrentDecodedImageBytes += bytes;
-  MOZ_ASSERT(sCurrentDecodedImageBytes >= 0);
-
-  // If we're using too much memory for decoded images, MaybeDiscardSoon will
-  // enqueue a callback to discard some images.
-  MaybeDiscardSoon();
+  // This function was made into a nop for the FF14 branch.  See bug 745141
+  // comments 54-56.
 }
 
 /**
  * Initialize the tracker.
  */
 nsresult
 DiscardTracker::Initialize()
 {