That is `data:text/html,...` samples — copy, paste into URL, submit. Unfortunately Firefox does not load "data:..." links [1], github "Try it" links digress to

That is `data:text/html,...` samples — copy, paste into URL, submit. Unfortunately Firefox does not load "data:..." links [1], github "Try it" links digress to hosted pages which breaks the point. You've made me think though. If it is hard to copy URL, maybe it is hard to copy code into the console. I've added buttons to my contenteditable demo [2]. [1] https://blog.mozilla.org/security/2017/11/27/blocking-top-level-navigations-data-urls-firefox-59/ https://blog.mozilla.org/security/2017/11/27/blocking-top-le... [2] http://sergeykish.com/live-pagesj http://sergeykish.com/live-pagesj