https://gs.statcounter.com/browser-market-share/desktop/worl...
Edge is available on Windows, Linux and macOS, so it would probably do. But that would allow one of Google's biggest competitors to drop an under-performing product and lobby for antitrust against Google. Unlikely to happen, but a risk Google might not want to take.
https://gs.statcounter.com/os-market-share/desktop/worldwide
Firefox is the only "credible" competitor, although Firefox's only profitable customer is Google itself.