diff --git a/README.md b/README.md
index 5a93f825c..b954b023f 100644
--- a/README.md
+++ b/README.md
@@ -70,7 +70,7 @@ and then you can open:
 
 + http://localhost:8888/web/viewer.html
 
-Please keep in mind that this requires an ES6 compatible browser; refer to [Building PDF.js](https://github.com/mozilla/pdf.js/blob/master/README.md#building-pdfjs) for usage with older browsers.
+Please keep in mind that this requires a modern and fully up-to-date browser; refer to [Building PDF.js](https://github.com/mozilla/pdf.js/blob/master/README.md#building-pdfjs) for non-development usage of the PDF.js library.
 
 It is also possible to view all test PDF files on the right side by opening:
 
@@ -83,7 +83,11 @@ viewer, run:
 
     $ gulp generic
 
-This will generate `pdf.js` and `pdf.worker.js` in the `build/generic/build/` directory.
+If you need to support older browsers, run:
+
+    $ gulp generic-es5
+
+This will generate `pdf.js` and `pdf.worker.js` in the `build/generic/build/` directory (respectively `build/generic-es5/build/`).
 Both scripts are needed but only `pdf.js` needs to be included since `pdf.worker.js` will
 be loaded by `pdf.js`. The PDF.js files are large and should be minified for production.
 
diff --git a/docs/contents/getting_started/index.md b/docs/contents/getting_started/index.md
index b3328734a..63fcbabe9 100644
--- a/docs/contents/getting_started/index.md
+++ b/docs/contents/getting_started/index.md
@@ -49,7 +49,7 @@ Before downloading PDF.js please take a moment to understand the different layer
     </span>
   </div>
   <div class="col-md-4">
-    <h3>Prebuilt (ES5-compatible)</h3>
+    <h3>Prebuilt (for older browsers)</h3>
     <p>
       Includes the generic build of PDF.js and the viewer.
     </p>