In Application Lifecycle Management (ALM) 12, the Web UI application is looking a bit differently on each browser: Chrome, Firefox and Internet Explorer (IE).
There are slight differences between Chrome, Firefox and Internet Explorer in
* CSS / Styles
* DOM Event support and DOM event triggering sequence
Aditionally it is important to say that ALM Web UI does not support legacy or old browsers like IE 9 or lower, or any other browser that does not support HTML 5 and EcmaScript 5.