It's not really better though - having only two real browsers is not good for open standards or the open web.
This will be especially true when Firefox inevitably shutters it's in-house efforts in a couple of years due to the amount of sites that won't work with it, and starts using Chromium too.
Staring into my crystal ball tells me Firefox will become "janky" in the eyes of users on account of how many sites don't load on it like they do Chromium (because developers will only test on the most popular browser, because THIS IS WHAT HAPPENS LITERALLY EVERY TIME).
This will be especially true when Firefox inevitably shutters it's in-house efforts in a couple of years due to the amount of sites that won't work with it, and starts using Chromium too.
Staring into my crystal ball tells me Firefox will become "janky" in the eyes of users on account of how many sites don't load on it like they do Chromium (because developers will only test on the most popular browser, because THIS IS WHAT HAPPENS LITERALLY EVERY TIME).