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I am on Windows 10 and I don't get freezes on any of the browsers that you mentioned. We are trying to figure out what works best for everyone, but there is no one size fits all solution unfortunately. Please keep reporting issues and we will try our best to resolve them.
Case
Why not send people to a different system, in Windows 10, it FREEZES on Opera and Firefox, neither of which run well under Windows 10. The new Edge has problems as well as using IE for Windows 10 isn't recommended. Now on the other hand Chrome Browser has some real bugs using Windows 10, but not when using Windows 8.1 Pro.
We are trying to track down different problems users are having with the games. We highly recommend using the "Freezing Help" link on the toolbar. That might help you figure out some problems!
Case
Why does the game freeze if you look on another browser or window during the game?