I think there was a huge missed opportunity with the recent Google monopoly case, which could have been used to give users a dialog box to select a browser from a list instead of starting with Chrome as the pre-installed default.

It's less drastic than forcing Chrome to be spun off, which I don't think was realistic, and it's almost an exact copy of an anti monopoly remedy used against both Microsoft and Apple. It likely would have a meaningful impact on browser market share and it would be very similar in spirit in terms of its impact to the proposed remedy of spinning off Chromium to a new company.

It would also be a convenient natural experiment testing the anti-Mozilla narrative that contends the browser market share decline had absolutely nothing to do with distribution defaults, but was instead exclusively driven by minutia of Mozilla's strategic decisions.