>The first claim is that Google is going to redirect user DNS traffic to Google's own DNS or another DoH-compliant DNS provider. That is incorrect. Because we believe in user choice and user control, we have no plans to force users to change their DNS provider. [...] We’re simply enabling support in Chrome for secure DoH connections if a user’s DNS provider of choice offers it.

Chrome will use the DoH frontend of the DNS server of the computer it's running on, respecting the user's choice. Instead, the Mozilla Corporation has decided that Firefox will route all DNS requests through CloudFlare regardless of user settings.