Container problem in the default project after firefox update

Hi!

I have created a default project by Sencha Cmd and it worked fine. But yesterday, after a firefox update (30.0) this project started to giving me this error on the console:

Error: validTypes is not defined

[W] targetCls is missing. This may mean that getTargetEl() is being overridden but not applyTargetCls(). tabpanel-1004

TypeError: container is null

me.container = container.dom ? container : Ext.get(container); In Google Chrome, the project runs well.