Guess I'll look into Opera. Using Firefox and now it's not only freezing, it crashed entirely with no warning whatsoever. RIGHT as I'd finished an event mission, and of course it didn't save my victory...
EDIT: Tried it with Opera, it lags slightly at times. I'll need to try it further.
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Had my first freeze with using Opera. Fortunately it was during menus... but still. Found out hardware acceleration was on and turned it off, but it hasn't helped the lag, so I'm not optimistic... guess I'll have to find another browser soon enough.