Indeed. We look after a huge, very diverse set of users (university science faculty - many thousands in our faculty, but tens of thousands across all faculties and professional services teams). According to https://gs.statcounter.com/browser-market-share Chrome has over 65% market share for desktops - not supporting Chrome would be overly restrictive.

Our users interact with a huge array of internal and external sites and web apps, virtually all of which will be tested on Chrome. Our LMS, collaboration tools, internal apps, SIEM tooling, HR systems, ERP, knowledge exchange partner portals - it's all been tested on, and works with, Chrome. And we're not in a position to force thousands of vendors to make sure their applications are standards compliant and work in less popular browsers (as much as we might like to). Not to mention the deluge of tickets we'd be dealing with when incompatibilities arise; banning Chrome would cripple us.

Google have backed us into a corner with this one by making a careless default choice that takes advantage of their market dominance and forces us to work around their decision.

Except IT does that all the time in most companies. You don't get to choose your own OS. You have to use Outlook and Teams in most windows shops. Good luck getting approval for an Office alternative.

Apart from two exceptions about 5 years ago, I've yet to encounter any of these sites in practice in Firefox.

And even when they work with non-chrome browsers if you run into an issue, you won't be able to get it escalated without trying with chrome (or lying and saying you did, I suppose).

E.g. Vivaldi is Chromium-based but doesn't include Nano Banana.