The only way to have stopped EME would have been to get Google and Microsoft, it's creators and promoters, to stop pushing it.

The only way to do that would be to affect their bottom line, such as people refusing to use their browsers if they ship EME.

That would have been the only campaign with a chance of stopping EME. Mozilla couldn't lead it - it would look self-serving ("how convenient, a browser vendor wants us to boycott its rivals"). The EFF as a respected third party could have.

That would have been our only hope.