There is always one bad apple in a web project, and quite often it's . So how to debug WebKit when you are on #linux? One solution is to use www.browserstack.com but it costs money and ... other things. But I just found something much better:

https://wiki.gnome.org/Apps/Web

Gnome Web uses WebKit for rendering and it's a "pleasure" to reproduce Apple browser bugs.

Happy Debugging!