Depending on the nature of the work and security protocols it isn’t the WTF. When you’re working, on your work device, on the work network, there is zero assumption of privacy (and there really shouldn’t be). The company wants to maintain it’s security and so it is ensuring it is aware of things happening on its network.

It’s not necessary for everyone everywhere but it has valid use case that isn’t some mega shady weird thing.

Especially since quantum threading individual tabs, I’ve never really had an issue with Firefox performance.

Individual site performance and things like DNS over https and ddos mitigation add more latency than anything I’ll notice from the browser level. And I’m happy to wait an extra second if it means having more control of my data and my privacy.