Its breaking a shitload og stuff on Firefox right now...I can't reliably use my home assistant interface with it enabled, onshape won't load CAD models and I can't use drop-down menus on a lot of sites.
I don't know what the hell they did, but it's breaking everything.
If it's not connected to a network(or connected to one without internet access), the data never leaves the TV though, and then the tracking doesn't really matter.