No, they mean Anti-Zionist Tag[0], an extension that is live on the Chrome Web Store and identifies anti-Zionists for the benefit of Zionists.

[0]https://chromewebstore.google.com/detail/anti-zionist-tag/ek...

Guess an anti-Zionist could use this too, to know who's cool. Except in reality this extension probably just scrapes data and mines bitcoin