I've been using it for about three years now. Recently, I started experiencing glitches on Reddit, and I couldn't figure out why the page was constantly reloading. I disabled all scripts, then spent two days disabling 50 add-ons one by one, and finally, at the end of the list, I disabled this one, and miraculously, the glitches and reloading stopped.
P.S. This is only on Reddit.