Just got the data breach deal today, like you they offered a limited time IBX deal. We've declined and decided to freeze our credit, already have more than we need.

https://www.experian.com/blogs/ask-experian/credit-education/preventing-fraud/security-freeze/

Did all three for each of us for free. FWIW, didn't see anything on experian, checked our credit card account, all kosher, so far.

Firefox only works with Firefox, the nice thing is, and I'm sure there's something similar for the other browsers, is you can go into the "hamburger" menu and select passwords, there you'll find all your saved logins and passwords. Is it secure? I guess, been using it for years, no problems noticed to date.