It's interesting you picked that, since the origins of that phrase is why Mozilla was even founded. And why they worked so damn hard for so many years on web standards.
As far as I'm aware, ublock is the biggest. And there's zero chance Google isn't aware of them. They've been fighting ublock techniques directly for years, including recently for the YouTube detection.
It's also what virtually every engineer there that has AdBlock uses when they're not using pihole or something.
God damn a bunch of sad sacks in this thread