ExtJs not working in Firefox?

Question

ExtJS/Sencha

The essence of the question is in the title, click events do not work in the interface created using extjs, and not only in my applications, but also in examples on the offsite.
I would like to ask you to test off. examples, it's not difficult for anyone to look at how the fox will behave))
Shl. everything works if you click the emulation of touch events, right here