[niutech]

TogetherJS works on any website too! Just grab a Firefox addon (https://togetherjs.com/togetherjs.xpi) or Chrome extension (https://chrome.google.com/webstore/detail/towtruckcrx/hpobkk...)

[veemjeem]

Yes, but you can't send your friend the surfly link. You have to ask your friend to also install the addon before you can collaborate on the same website. Extensions are cool, but not practical in the real world scenario.