Oh I imagine the papers are being filed as we speak, because this is blatantly illegal.
Well you typically need standing in order to file a lawsuit, who would do it? Mozilla are probably the only ones. Why would this cause them to do it when past similar practices haven’t?

Users affected by it, Mozilla, any other company that comes to support Mozilla, watchdog groups like the EFF…

It can also be brought by attorneys general and governmental regulators, the FCC and FTC might have a bit to say about it…

Antitrust suits aren’t civil cases, I don’t think, so “having standing” is a bit different

I’m not a lawyer though so I could be way off base, but the antitrust cases I’ve been aware of I don’t think they were brought by companies but by government agencies