No, please, none of but-IE-came-with-Windows stuff.
The dominance of Chrome on the mobile has been set up by its dominance on PC, Android even originally had its own, different browser, Chrome came later, as a store app, and it was only available on devices that met certain minimum specs.
Firefox used to be the dominant browser on PC (although neck to neck with IE for a long time), and lost that spot.
It lost me around the 3.x to 4.0 transition, even though I had used it since 1.x, and that was about the turning point.
Chrome, back at the time, was in a somewhat similar position Edge finds itself now, i.e. offering a more limited experience than the dominant browser but looking fresh and promising.
Regular users loved Chrome’s speed (V8 anybody), something that proved crucial at a time when Web 2.0 and AJAX were the hot new thing. It also offered sandboxing, a feature not available in any other browser back then.
“Chrome” came to signify “cool, fast browser that puts your old browser to shame”. And that was sad, because we all loved Firefox, and it was like Mozilla had let us down with 4.0. And those notions carried over to Android.
Devices proliferated, and sync turned from new, cool thing to something everybody needed, so now if you’re using a browser on the desktop, chances are that’s the same browser you want to use on your mobile and other devices.
I don’t have much love for Google these days, but fair’s fair.