diff --git a/modules/libpr0n/src/imgLoader.cpp b/modules/libpr0n/src/imgLoader.cpp
index f173b8b1dea..50f4b528670 100644
--- a/modules/libpr0n/src/imgLoader.cpp
+++ b/modules/libpr0n/src/imgLoader.cpp
@@ -534,9 +534,13 @@ nsresult imgLoader::InitCache()
   os->AddObserver(gCacheObserver, "chrome-flush-skin-caches", PR_FALSE);
   os->AddObserver(gCacheObserver, "chrome-flush-caches", PR_FALSE);
 
+#if 0
   gCacheTracker = new imgCacheExpirationTracker();
   if (!gCacheTracker)
     return NS_ERROR_OUT_OF_MEMORY;
+#else
+  gCacheTracker = nsnull;
+#endif
 
   if (!sCache.Init())
       return NS_ERROR_OUT_OF_MEMORY;
diff --git a/modules/libpref/src/init/all.js b/modules/libpref/src/init/all.js
index 3a42fad8677..fc6415558cc 100644
--- a/modules/libpref/src/init/all.js
+++ b/modules/libpref/src/init/all.js
@@ -2668,7 +2668,7 @@ pref("toolkit.zoomManager.zoomValues", ".3,.5,.67,.8,.9,1,1.1,1.2,1.33,1.5,1.7,2
 
 // Image cache prefs
 // The maximum size, in bytes, of the decoded images we cache
-pref("image.cache.size", 5242880);
+pref("image.cache.size", 52428800);
 // A weight, from 0-1000, to place on time when comparing to size.
 // Size is given a weight of 1000 - timeweight.
 pref("image.cache.timeweight", 500);