x.patch

diff --git a/image/ImageCacheKey.cpp b/image/ImageCacheKey.cpp
index 52bffcd409e3..091f83c795d4 100644
--- a/image/ImageCacheKey.cpp
+++ b/image/ImageCacheKey.cpp
@@ -123,7 +123,9 @@ void ImageCacheKey::EnsureHash() const {
   // Since we frequently call Hash() several times in a row on the same
   // ImageCacheKey, as an optimization we compute our hash once and store it.

-  nsPrintfCString ptr("%p", mControlledDocument);
+  static uint32_t counter = 0;
+
+  nsPrintfCString ptr("%p%d", mControlledDocument, counter++);
   nsAutoCString suffix;
   mOriginAttributes.CreateSuffix(suffix);