UseFirebug : WOConditional { condition = useFirebug; } JS : ERXJavaScript { //FIXME : It works only if this get called. Little Strange but for now it works framework = "ERFirebug"; filename = "content/firebug-lite-dev.js"; } JS2 : ERXJavaScript { framework = "ERFirebug"; filename = "content/firebug-lite.js"; }