How To Unfreeze Your Chromebook. If you see your device in this list follow. To free up memory close any open tabs apps or other processes that are not in use.

Insert your USB drive and wait. Note how much CPU and memory each is using. In fact this hack had been tried and tested on almost all laptops with a detachable battery.
It should fix your frozen or unresponsive Chromebook.
Try a little longer. If not then it must be a. Try using Chrome with these two extensions NoScript and uBlock Origin. On the Chromebook keyboard press the Power button and the Reload button at the same time.
