> If your site has AMP Real URL enabled Cloudflare will digitally sign the content we provide to that crawler, cryptographically proving it was generated by you

> If your site has AMP Real URL enabled Cloudflare will digitally sign the content we provide to that crawler, cryptographically proving it was generated by you. That signature is all a modern browser (currently just Chrome on Android) needs to show the correct URL in the address bar when a visitor arrives to your AMP content from Google’s search results. Is the dig (emphasized above) about what constitutes “a modern browser” really necessary? Is a modern browser now whichever one that supports something you like?