Yes, in part thanks to their efforts to make it harder to use other browsers...

I think you are overestimating the inclination anybody has to use those.

How do you know what people 'intend' to use? Making it inconvenient to use alternative browsers especially when they compete with your own is manufactured consent not intention. I use FF on Linux and have to go through that crap every time FF updates even though nothing else has changed.

It seems to me that packaging a malicious browser to look like a familiar one is actually an attack vector