+1. I love EN but there's definitely something wrong with the Web Clipper extension. Uninstalling/re-installing, clearing caches, signing in/out again, etc., and Safari would crash Safari (seg. fault) at least once a day, usually when opening a new tab.
Finally, I removed the EN Web Clipper altogether a few days ago and Safari has been rock solid since. I liked using the Web Clipper but if it crashes my browser it's not very useful.
Mac OS X 10.11.3
MacBook Pro (Retina, 15-inch, Mid 2015)
2.5 GHz Intel Core i7
16 GB 1600 MHz DDR3
1 TB ePCI Flash Storage