Hi ajnin, thanks for your feedback.
> Extensions are a privacy concern and consume memory needlessly.
Yes, that's why we don't ask for any permission, so the extension only gets activated when you click on the button.
> I'm not going to give any personal info to a website I don't trust with my email in the first place
Everyone can get hacked, governments, big companies... so who do you trust enough to give your email?
> I also don't understand how this is not going to be blacklisted like any other anti-spam email service.
Some services might block our addresses some day, but that would be a mistake because nBox is not a disposable email service.