Generate a secure random (using crypto library) password with two clicks. The new password is copied to the clipboard ready to be pasted into a registration page.
You can choose alpha only, alphanumeric, or most secure alpha numeric with symbols, lengths range from 8 to 32 chars in 4 char increments.
I recommend using alpha numeric with symbols with a length of 16 characters (or more if the website allows it!) and storing your new password in a secure trusted password manager like Mozilla Firefox account.
Source is available for review (as all security related code should be):
No data is collected, configuration for advanced section are saved to your firefox sync account. (https://gitlab.com/robblue2x/niobium-password-gen/blob/master/src/popup/index.jsx#L21