100% cpu when idling

Hello! What do you mean by "idling'. Do you mean the web-site everhelper.me ? my cpu is fine with it. 

Hi, after restarting Chrome and letting the pages load and the CPU settles down, this task "Subframe: https://everhelper.me" remains using around 100% CPU until you end it.  It is enough to make fans spin up faster so is quite noticeable.

I have uninstalled the extension now and it has stopped.

Hello! Do you use EverSync for Chrome? May be it was syncing process in background?