Your web browser is probably not the best password protector for secure passwords. I use Last Pass which will generate secure passwords and store them for you. With Last Pass you just remember one secure password, made up by you, to log into the last pass vault. once logged in it will autofill your username and password for the sites you visit.
Remember that passwords using birthdays, family member names and even things like 1234 are not secure.
And any secure shopping or banking sites should have it's own secure password,not one shared by many sites you visit. Especially if you use that password on Social Media( facebook,Twitter,and such).