hello, if you log into your emails on a website, then you will be able to access them and your contacts on a new pc this way as well. otherwise please see Problems with email and how to find help

How do I COPY my address book when I am switching from one computer to another?

firefox doesn't have an address-book, so your question is likely misplaced in this forum...

Firefox Mozilla.....Thunderbird email. In my Thunderbird email program I have address books. How do I COPY my address books?

• changing question category to thunderbird*

How do I COPY my Thunderbird address books? Thanks

The best way is to copy and move your entire profile. Then your mail, address books and settings get moved.

http://kb.mozillazine.org/Move_to_a_new_PC

If you insist on just address books, use the export operating under Tools in the address book window.

FYI: Firefox is an Internet browser and Thunderbird is an email client. You seem to have been asking an email question in the Firefox forum causing the initial confusion.