Fraidycat is very cool and I encourage everyone to check it out. It is a fantastic idea and it generally works well.

However, to save you time if you run into the same issue it has with Chrome that I encountered.. there's a bug where using the back button on many sites (including HN and many of our internal apps) can cause a non-logged in page to be fetched and rendered (as if the session cookie isn't being used) - possibly relevant issues: https://github.com/kickscondor/fraidycat/issues/178 and https://github.com/kickscondor/fraidycat/issues/194