Ok thanks. I'm not sure how much vetting we've really done on the rest of the polyfill list (even if the wiki page they come from does call itself a "No-Bullshit Guide") – but definitely keen to strip out any which aren't up to the job. If so, we should remove it from polyfills.json and the wiki too.

It's only fair if we give @MrSwitch a chance to respond though – what are your thoughts on what @Asmod4n said above? Should we still be recommending notification.js?