diff --git a/mfbt/Vector.h b/mfbt/Vector.h
index 1fcd77242b..6d5c769e9d 100644
--- a/mfbt/Vector.h
+++ b/mfbt/Vector.h
@@ -18,6 +18,7 @@
 #include "mozilla/Move.h"
 #include "mozilla/OperatorNewExtensions.h"
 #include "mozilla/ReentrancyGuard.h"
+#include "mozilla/Span.h"
 #include "mozilla/TemplateLib.h"
 #include "mozilla/TypeTraits.h"
 
@@ -553,6 +554,16 @@ public:
     return *(end() - 1);
   }
 
+  operator mozilla::Span<const T>() const
+  {
+    return mozilla::MakeSpan(mBegin, mLength);
+  }
+
+  operator mozilla::Span<T>()
+  {
+    return mozilla::MakeSpan(mBegin, mLength);
+  }
+
   class Range
   {
     friend class Vector;