06/26/20246 min readpolyfill.io, a popular JavaScript library service, can no longer be trusted and should be removed from websites.Multiple reports, corroborated with data seen by our own client-side security system, Page Shield, have shown that the polyfill service was being used, and could be used again, to inject malicious JavaScript code into users’ browsers. This is a real threat to the Internet at large given the popularity of this library.We have, over the last 24 hours, released an auto...