I've never had a problem with Kraken on Firefox with Win 7/8/8.1. There's plenty of browsers out there, bound to be something that's suitable for the Jobsian Cult. True to form though, they tend to blame every other application before remembering that they're the ones running closed ecosystems.

I think Kraken has taken enough criticism over the last week or two, some of it warranted, most of it not. They may be having some growing pains but as someone who's had an account for a few months now, it's good to see the new members joining the exchange and the volume increasing. Hang in there folks, it will all work out in the end, in all my dealings with the Kraken support team they have been first class.