I upgraded my test splunk to 6.2
IE 9 kind of worked but having trouble with IE11 now or it fails to load.
Chrome works after on the second or third tab, but if you bring up Chrome and try to connect it fails to load.
Fire Fox works find before and after the install/upgrade of Splunk to 6.2.
There were a couple of previous posts on this topic. Check them out for more information:
View solution in original post
One other thing. with IE 9
I would get the black screen of death and turn off Compatibility and it worked sometimes.