When you view a paywalled scholarly article, Unpaywall automatically checks its open database of 16 million legal, open-access articles. If there's an open vers

When you view a paywalled scholarly article, Unpaywall automatically checks its open database of 16 million legal, open-access articles. If there's an open version somewhere, you'll see a green tab on the article. Click the tab and read for free, legally! Unpaywall is a free, open-source project from Our Research, a nonprofit dedicated to making scholarly research more open, accessible, and reusable. https://addons.mozilla.org/en-US/firefox/addon/unpaywall/ https://addons.mozilla.org/en-US/firefox/addon/unpaywall/ https://chrome.google.com/webstore/detail/unpaywall/iplffkdpngmdjhlpjmppncnlhomiipha?hl=en https://chrome.google.com/webstore/detail/unpaywall/iplffkdp...