> How about, sell the product without restricting retailers from replacing the vendor's browser with another one, or How about, sell the product without restricting retailers from replacing the vendor's browser with another one,

PC vendors have been and do ship any type of crapware they want on their computers.

> or give the customer a choice which browser they want the same as they choose how much RAM they want etc. browser they want the same as they choose how much RAM they want etc.

And when they had that choice in Europe - they mostly still chose Chrome…

https://arstechnica.com/information-technology/2014/12/windo...

> Android. And then people who want to use the same browser on desktop and mobile for sync.

And those people can still download Firefox on iOS or Android and sync bookmarks.

In fact Firefox and Chrome Windows users can sync their bookmarks to iOS Safari using extension written and supported by Apple.

> What stops you from running macOS in qemu or a virtual machine on any non-Apple hardware with the same architecture? What stops Samsung from writing iOS drivers and offering iOS on Galaxy phones? Only Apple's refusal to sell it to you without making you also buy hardware.

Is that really a reasonable argument when Samsung doesn’t even support its own hardware with drivers for more than a couple of years?

> whereas the OS vendors successfully impeding anyone who can't command the equivalent of billions in advertising explains it really well.

Just maybe Firefox - which is free to compete with Google on desktop computers just doesn’t make a compelling case for why no one wants it?