I’ve experienced intermittent problems with WebRep using lots of CPU and then crashing shortly after I open Chrome. I THINK the triggering event is when Chrome self-updates to a new version. Once it starts happening, it continues to happen until I (a) uninstall the Chrome WebRep extension via the Chrome extensions page, and then (b) reinstall it via the Avast Mac application. Then everything is fine for 2-3 weeks until the triggering event (again, I THINK it’s Chrome doing a self-update, although I’m not certain of this) happens again.
I’ve seen references to a similar-sounding problem other Forum threads–thought I would pass along the fix that works for me in case it’s helpful to someone else.