ext5 with firefox 34 ?

Hello,

Until now, i have used Extjs 4.2.1. All work, but i want pass the step of Extjs 5.

When i look demo's page ( like http://ift.tt/1ywchiM ) with chrome, all are ok. that's nice !

But i use also firefox ( current version : 34.0 ) and there is my problem.

When I load the same page, all panel are rendered, but no one are "active".

if i click on a collapse button, datefield selector, expand combo, sort column, .... it s like i have do nothing.

In fact, it's like all "listerners" are disabled. But i see no error on my console.

so, i resume :

same computer/windows, all are ok with chrome, but not with firefox. And with ext4.2.1, it s ok with both.

If i go to an other computer, with firefox 34 too, it s ok !

Is it possible to EXT5 dont run with some firefox-plugin ?

thanks for your help

ext5 with firefox 34 ?