WebStorm 7 added a line

.idea/runConfigurations/Amber_server.xml

@@ -1,5 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="Amber server" type="NodeJSConfigurationType" factoryName="Node.js" path-to-node="C:/Program Files/nodejs/node" path-to-js-file="vendor/amber/bin/amber-cli.js" application-parameters="serve" working-dir="$PROJECT_DIR$">
+    <browser start="false" url="" with-js-debugger="false" />
     <RunnerSettings RunnerId="NodeJS.run" />
     <ConfigurationWrapper RunnerId="NodeJS.run" />
     <method />