Having an offering in this space would be one of the most sensible decisions the Mozilla Foundation has made in recent history.
https://firefox-admin-docs.mozilla.org/reference/policies/
Maybe I'm missing what you're getting at with the point about centralized logging and some of the DLP but I'm not sure why we would be okay with breaking a browser's trust in that way, DLP and proxy gateways have been pretty standardized for a while. At least with Chrome, it makes sense if you're a Google shop and have access to a lot more tie-ins. Maybe that's the point.
You also get the ability to deploy all browser infrastructure on-premise, to effectively decouple yourselves from us and get sync data, telemetry, and so on all stored on-prem, serve updates from your own servers, etc. This is something that wasn't really practical before.
I'm not sure why we would be okay with breaking a browser's trust in that way
I'm not sure what you mean here. If we accept that this is something a lot of Enterprise deployments require, wouldn't you prefer to have things like DLP, VPN and security logging be built-in in the browser, rather than being provided by third-party products that intercept or hook the browser traffic somehow?