You know, this Ryanair thing leads me to a question: is the problem here really the Jolla browser, or the Ryanair website? Creating a website that works on a broad range of web browsers is not rocket science: you simply adhere to the published W3C standards.
Problem is, nobody ever adheres to the standards.
For some reason, big companies always produce pages that depend on features specific to Microsoft's browser, or Google's browser, or use some goofy plugin.
There's always a race to add dependencies on the newest, least-supported, and most broken features as well. It kinda drives me nuts...