diff --git a/karma.conf.js b/karma.conf.js
index b0e5107..1fe5579 100755
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -39,7 +39,7 @@ module.exports = function(config) {
 		// - Safari (only Mac)
 		// - PhantomJS
 		// - IE (only Windows)
-		browsers: ['Chrome'],
+		browsers: ['Chrome', 'Firefox'],
 
 		// If browser does not capture in given timeout [ms], kill it
 		captureTimeout: 60000,