diff --git a/xpfe/browser/resources/content/pageInfo.js b/xpfe/browser/resources/content/pageInfo.js
index a74bda4e371..405810e6fa5 100644
--- a/xpfe/browser/resources/content/pageInfo.js
+++ b/xpfe/browser/resources/content/pageInfo.js
@@ -202,7 +202,7 @@ function makeGeneralTab()
 
   try
   {
-    var cacheEntryDescriptor = httpCacheSession.openCacheEntry(url, Components.interfaces.nsICache.ACCESS_READ, true);
+    var cacheEntryDescriptor = httpCacheSession.openCacheEntry(url, Components.interfaces.nsICache.ACCESS_READ, false);
     if(cacheEntryDescriptor)
     { 
       switch(cacheEntryDescriptor.deviceID)
@@ -229,7 +229,7 @@ function makeGeneralTab()
   {
     try
     {
-      cacheEntryDescriptor = ftpCacheSession.openCacheEntry(url, Components.interfaces.nsICache.ACCESS_READ, true);
+      cacheEntryDescriptor = ftpCacheSession.openCacheEntry(url, Components.interfaces.nsICache.ACCESS_READ, false);
       if (cacheEntryDescriptor)
       {
         switch(cacheEntryDescriptor.deviceID)
@@ -692,7 +692,7 @@ function makePreview(item)
 
   try
   {
-    var cacheEntryDescriptor = httpCacheSession.openCacheEntry(url, Components.interfaces.nsICache.ACCESS_READ, true);   // open for READ, in blocking mode
+    var cacheEntryDescriptor = httpCacheSession.openCacheEntry(url, Components.interfaces.nsICache.ACCESS_READ, false);   // open for READ, in non-blocking mode
     if (cacheEntryDescriptor)
     {
       switch(cacheEntryDescriptor.deviceID)
@@ -719,7 +719,7 @@ function makePreview(item)
   {
     try
     {
-      cacheEntryDescriptor = ftpCacheSession.openCacheEntry(url, Components.interfaces.nsICache.ACCESS_READ, true);   // open for READ, in blocking mode
+      cacheEntryDescriptor = ftpCacheSession.openCacheEntry(url, Components.interfaces.nsICache.ACCESS_READ, false);   // open for READ, in non-blocking mode
       if (cacheEntryDescriptor)
       {
         switch(cacheEntryDescriptor.deviceID)