as for hiding processes you can either control + click on a process and it comes up a menu option to "hide process x" or if you know what the process is called you can go into the search bar, type the process you're trying to hide and hit enter, then click the little "any" next to it and then choose "process" and "does not contain" and you can also save the search so you don't have to keep doing this every time, webkit i'm pretty sure is called com.apple.WebKit.WebContent
thanks for the right click folks, that is tremendous