It can, along with a bunch of other GPOs in an admx template.

But how many companies are running Workspace + Windows with on-prem AD? I suspect that number is shrinking pretty rapidly. You can do it with InTune as well, but it starts to get real messy if your users aren't on Windows or you have non-windows endpoints.

If you're a mac shop, on google workspace, and using something like JamF (or even Intune+EntraID), you are stuck deploying .plist files to each endpoint, you don't get compliance reporting back, and you lose a ton of visibility.

These are all things that don't matter to each individual user, but are hugely important to IT/security in the company, and Firefox unfortunately just doesn't have any centralized management platform for it.