--- a/toolkit/components/payments/docs/index.rst
+++ b/toolkit/components/payments/docs/index.rst
@@ -8,16 +8,21 @@ JSDoc style comments are used within the
 
 .. toctree::
    :maxdepth: 5
 
 
 Debugging/Development
 =====================
 
+Must Have Electrolysis
+-------
+
+Web Payments `does not work without e10s <https://bugzilla.mozilla.org/show_bug.cgi?id=1365964>`_!
+
 Logging
 -------
 
 Set the pref ``dom.payments.loglevel`` to "Debug" to increase the verbosity of console messages.
 
 Unprivileged UI Development
 ---------------------------
 During development of the unprivileged custom elements, you can load the dialog over a file: URI or