diff --git a/README.md b/README.md
index 25ae87bfa..c01ecd67e 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,10 @@
 * iD is a JavaScript [OpenStreetMap](http://www.openstreetmap.org/) editor.
 * It's intentionally simple. It lets you do the most basic tasks while
   not breaking other people's data.
-* It supports modern browsers. Data is rendered with [d3.js](http://d3js.org/).
+* It supports all popular modern desktop browsers: Chrome, Firefox, Safari,
+  Opera, Edge, and IE11.
+* iD is not yet designed for mobile browsers, but this is something we hope to add!
+* Data is rendered with [d3.js](http://d3js.org/).
 
 ## Participate!