It used to work well. Now that it's been "updated" to automatically detect logins, it no longer supports Outlook/Hotmail. If I log off and back on, it's there briefly, but then disappears and won't return.

No longer recognises e-mails. Google, Outlook and others do not work.

Pros: It can handle Multiple Google Accounts well. (Previously X-notifier(not Neo) needs re-login to the other Google account.)
Cons: It can not keep accounts information. (Previously X-notifier(not Neo) can keep them.) Accounts information on the dashboard and the right click menu of the icon disappear automatically every time. I guess this is a side effect of Neo's automatic login detection. So, I still need to use X-Notifier(not Neo) to keep my account settings.
Conclusion: Neo has not yet been able to become a successor to X-Notifier.

Hace ya un tiempo que lo uso, manejando cuentas de hotmail y gmail. Me parece ligero y útil; como siempre gracias por los complementos útiles.

No tiene opción para Yandex Mail.

No me reconoce el email aol.com. Tanto para gmail con varias cuentas, y yahoo de lujo.

This add-on is not being updated and it barely works. It will only check one Gmail account, and you can't even force it to check another one. You have to uncheck everything and only check that one, and then it probably won't check it. This used to be such a great little tool, but now it's almost useless.

comprehensive functionality
very fast support

It works many times better than X-notifier.

Le quitaron muchas opciones del X-notifier que lo hacían bueno

Better than X-notifier

i liked this addon very much. it's been working so well. thank you.
the recent update 84.0.2 has broken this addon. i see that the new update version 2.2.8 has just been released. but instead of showing unread primary message count, it shows all unread email count. i hope it will get fixed. thanks.

Would be nice if containers would be supported (Google Container addon)