It's a must have add-on. But it causes some serious problems with the copy-paste function throughout the system. As soon as I install this add-on and start using it my copy-paste function starts malfunctioning. I have to press Ctrl+C like 5 times to make sure that it would have worked at least once. It's very annoying to copy something and when you go to other place and press Ctrl+V, it turns out nothing was copied.
Now a days, it has starting causing problem with Whatsapp web as well. When I copy an image from clipboard directly into Whatsapp web, it shows a black image. But if I do the same using google chrome browser, where I don't have this add-on installed, it works fine. After months of headache, I have finally reached the conclusion that this add-on is the culprit.