This is a problem I have had for several months now. I have been hoping the 5.1 upgrade would fix this, but it didn't. This isn't just Chrome, every browser I have tried freezes up often. If I do a factory reset, it will fix it for a few days, but slowly but surely, the browsers begin to freeze and crash again. I don't usually open a browser straight up; most of the time I am clicking links in other apps, mostly Feedly, which opens the browser up. Is this due to the memory leak issue I have read about? I try to keep the cache clear, so that shouldn't be a problem.