The polyfill.io domain is being used to infect more than 100,000 websites with malware after a Chinese organization bought the domain earlier this year. Multiple security firms sounded the alarm on Tuesday, warning organizations whose websites use any JavaScript code from the polyfill.io domain to immediately remove it. The site offered polyfills – useful bits of JavaScript code that add functionality to older browsers that is built into newer versions. These in-fills make life easier for develo...