It slows down my browser for some reason, so I had to uninstall it. Also, the extension kept popping up which was very distracting and annoying. The extension also often overrides normal access to the most random websites, making it nearly impossible to view some sites because the extension forces me to visit a different site or just refuses to let me access it. And once I have managed to log into a site it still takes me numerous clicks to get to the PDF. Overall not a very helpful tool for my research.