Please consider adding a feature that allows the user to customize character sets for the four password generation categories. IE under advanced settings a user could go into any of four fields that by default are filled with the alphabet in upper and lower case, the numbers zero through nine, and the symbols found on a standard english QWERTY keyboard. Perhaps expand upon this by providing predefined character sets for other languagues, if applicable, the user can choose from that when picked fill the four character sets appropriately.
As it stands now the current password generator uses (as best I can tell) most of the qwerty symbols. Many of which are unacceptable across multiple sites (pound, ampersand, tilde, caret, dollar sign, all seem to often be undesirable). Thus prompting this request. And since I was asking for symbols it seemed like a good idea to expand into the other groups and then venture into alternative character sets for other languages. Being a dev myself it seems like it'd be a really easy change for the level of control it'd give the user.