Already tried this and a bunch of stuff recommended on another post but it was still going. What worked for me was killing the process with activity monitor and restarting my computer, along with anything else. Could it be possible for this process to be triggering Help Viewer as well?
@coffeemug,
Is there a particular site and/or extension you were using at the time that you can think of that may have been responsible? Perhaps something relatively heavy like video streaming (Netflix, Hulu, etc) or a gaming site/in-browser game?