--- a/content/base/src/nsFrameMessageManager.cpp
+++ b/content/base/src/nsFrameMessageManager.cpp
@@ -612,17 +612,17 @@ nsFrameScriptExecutor::LoadFrameScriptIn
   if (!channel) {
     return;
   }
 
   nsCOMPtr<nsIInputStream> input;
   channel->Open(getter_AddRefs(input));
   nsString dataString;
   if (input) {
-    const PRUint32 bufferSize = 1024;
+    const PRUint32 bufferSize = 8192;
     char buffer[bufferSize];
     nsCString data;
     PRUint32 avail = 0;
     input->Available(&avail);
     PRUint32 read = 0;
     if (avail) {
       while (NS_SUCCEEDED(input->Read(buffer, bufferSize, &read)) && read) {
         data.Append(buffer, read);