The firefox version of this clipper is slow, and is frequently reported as slowing the browser. That said, the Evernote Web Clipper's excellence is why I use Evernote rather than OneNote. It auto-finds the notebook my clippings should go to, has multiple choices about what to cut, and is a pleasure to look at. If the speed could be fixed, I would give it five stars.
Great so far, I could use tutoring to get full use as an author. I will say this product is instrumental in my finally writing. Web Clipper allows me to research, browse, look for property on ad infinitum.
Avast flags this add-on as unstable. It clearly is. If you enable this on firefox quantum you'll bleed all of your memory in a few hours, meanwhile you'll bleed all of your virtual memory. Disable the add on and restart firefox and everything runs normally. I don't know what language this is written in but its possible the bug could threaten your data or you disk integrity (not from memory bleeding but from a bad pointer or a malformed interpreter call). I would NOT run this program except in a test environment. Digging into the Evernote forums, it appears Evernote has had memory issues with this program since Genesis I.