@jaiden4079 yes, although in my experience FPI breaks some sites (with regard to SSO), and MAC is a lot more flexible in how you can set up groupings of sites yourself, there's just more control. FPI is largely invisible to the user, but in my opinion a good MAC setup will be at least as protective as FPI and more useful/convenient after setup.

Depends on what works for you, If you're using FPI and have no issues then MAC probably isn't necessary.