Test in firefox on travis

.travis.yml

@@ -3,6 +3,10 @@ node_js:
   - "0.11"
   - "0.10"
 
+before_install:
+  - "export DISPLAY=:99.0"
+  - "sh -e /etc/init.d/xvfb start"
+
 before_script:
   - npm install
 

gulpfile.js

@@ -139,7 +139,7 @@ function unittestTask() {
 
 	return gulp.src(files)
 		.pipe(karma({
-			configFile: 'karma.conf.js',
+			configFile: 'karma.conf.ci.js',
 			action: 'run'
 		}));
 }

karma.conf.ci.js

@@ -0,0 +1,7 @@
+module.exports = function(config) {
+	config.set({
+		browsers: ['Firefox'],
+		frameworks: ['jasmine'],
+		reporters: ['progress', 'html'],
+	});
+};