Only in the EU because of that ruling. IIRC they are not implementing the requirement elsewhere (though they might eventually if the difference gets sufficient bad press or becomes technically inconvenient).
Is it?
I thought it was basically Firefox with another HTML rendering engine (and I guess javascript runtime).
Those are the main parts of the browser.
They are large parts of the browser, certainly. But they don't encompass all the fun network, fetch, and caching behaviour entailed in this issue.
I don’t know how they are doing it differently, but it’s definitely a different experience than Safari.
Yeah I like FF sync to move tabs and send stuff to other devices. I have an android phone, an iPad and a Linux PC.