You might want to know that Dropbox Passwords hogs the CPU On windows if the browser is running but the Passwords native app is not. You will see high CPU usage from the Windows Delivery Optimization service, but the culprit is DBP whose extension is trying to contact with the host app in a loop, constantly spawning processes that die.

Thanks so much--nsm alerted us and we have a fix in the works--an update should be available presently.

Thank you for this report. I've passed on the information to the right team and they are looking into it.