I use https://www.hoopladigital.com. On Firefox, when I log in, MB (Malwarebytes) says This makes Hoopla not work as a visual - everything is white and I can't see anything but shadows (I assume the "fill" of that is color). When I use the app Everything to search all files, the only polyfill.io I find is: polyfill.io.js in this folder C:\Users\[user]\AppData\Local\Google\Chrome\User Data\Default\Extensions\oldceeleldhonbafppcapldpdifcinji\4.4.8_0\polyfills My