Index: README.md
diff --git a/README.md b/README.md
index 2140c07d2be8c2905d886ded63e38c849d49a76b..af78809cde278491d6a509dca251b4bca6982f9b 100644
--- a/README.md
+++ b/README.md
@@ -86,15 +86,19 @@ extension's Options page, open the JavaScript Console and type in:
     location.href = "qunit/index.html";
 
 The unit tests will run automatically once the page loads.
-You can also run these tests with a headless Firefox process. Install the
-dependencies first:
+You can also run these tests with a headless Firefox or Chromium process.
+Install the dependencies first:
 
     npm install
 
-Start the testing process:
+Start the testing process for all browsers:
 
     npm test
 
+Start the testing process in one browser only:
+
+    npm test -- -g <gecko/chrome>
+
 Linting
 -------