I think that is a mistaken view, but rather than argue that I'll put a more interesting question. If you believe that there is a cartel here and the result is that we the plebs get high quality products for free, do you think cartels are a bad thing? Because it seems to be all upside for pretty much everyone. If this is a cartel (which, again, I don't see it), we should be looking to get cartels involved in food and housing.
Breaking up this 'cartel' is literally going to mean that the best 4 web browsers won't get quite as much development effort directed towards them. The plan seems to be to choke them of so much development that even dodgy hobbyist projects can complete. That is a low-quality bar.
But we don't get the high quality products for free. Google is using Chrome to strenghten their market dominance in other markets, such as advertising. Furthermore, they are using their market power in browsers to push through standards and protocols that mostly benefit them.
Just ask yourself this: Google is one of the largest and most profitable companies on Earth. They are a for-profit, capitalistic company. Legally, their main duty is to maximize shareholder profit. Why would they give away somehting for free, if in the end, it does not benefit them more than not giving it away for free?
Competition is always better for consumers, unless you believe in a "benevolent dictator" situation (which, as reality shows, also never ends well).
Breaking up this 'cartel' is literally going to mean that the best 4 web browsers won't get quite as much development effort directed towards them. The plan seems to be to choke them of so much development that even dodgy hobbyist projects can complete. That is a low-quality bar.