Very handy, been using it for a few weeks and am relatively satisfied with this add-on.

However I think that there are 2 significant blunders or "rookie mistakes."

#1: enforcing a minimum count of a certain type of character. By using the up and down arrows, only a minimum of 2 can be selected. But a 0 (zero) can be manually entered, and should be, to maximize randomness and eliminate a bias. The outline should not be highlighted in red as if it's not a good thing to specify a minimum of 2 characters for a particular type of character.

#2: there is no explanation as to how the random characters are generated, how robust is the cryptographic process. True randomness is very difficult to generate. These passwords are probably good enough for log-in passwords, but what about for use with true encryption? If I need robust passwords for encryption I'd go to grc.com, packetizer.com, or use Keepass.