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You can run Gnome Web for free. It's the open source version of WebKit so you won't be able to see all the tweaks Apple adds to their proprietary build, but it's close enough that obvious differences are visible, at least on desktop. Safari on iOS cannot be tested without paying Apple so I generally don't for my personal stuff either. All of that said, American developers often can't even be bothered to support chara…
Right, but approximately zero people have ever said "this website doesn't work on Firefox, so I won't use this website". They say "this website doesn't work on Firefox, so I won't use Firefox".
I welcome the Safari walled garden because if Apple have to allow chrome on ios, that's the end of any cross browser testing (and the end of Firefox)