diff --git a/accessible/README.md b/accessible/README.md
index 0246c9daf..f560761c5 100644
--- a/accessible/README.md
+++ b/accessible/README.md
@@ -6,7 +6,7 @@ to blind users.
 
 The code in this directory renders a version of the Blockly toolbox and
 workspace that is fully keyboard-navigable, and compatible with most screen
-readers.
+readers. It is optimized for NVDA on Firefox.
 
 In the future, Accessible Blockly may be modified to suit accessibility needs
 other than visual impairments. Note that deaf users are expected to continue
diff --git a/demos/accessible/index.html b/demos/accessible/index.html
index 6a3294bf4..78ab37e5f 100644
--- a/demos/accessible/index.html
+++ b/demos/accessible/index.html
@@ -59,9 +59,9 @@
   </h1>
 
   <p>
-    This is a demo of a version of Blockly designed for screen readers. It
-    allows users to create programs in a workspace by manipulating groups of
-    blocks.
+    This is a demo of a version of Blockly designed for screen readers,
+    optimized for NVDA on Firefox. It allows users to create programs in a
+    workspace by manipulating groups of blocks.
     <ul>
       <li>To explore a group of blocks, use the arrow keys.</li>
       <li>To navigate between groups, use Tab or Shift-Tab.</li>