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How do I delete suggested e-mail names in autofill

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This is a previously-owned computer. When Thunderbird suggests autofill e-mail names, many come up that I don't know. They are from the previous owner. They do not show up in my address book. How do I delete them?

thanks!

This is a previously-owned computer. When Thunderbird suggests autofill e-mail names, many come up that I don't know. They are from the previous owner. They do not show up in my address book. How do I delete them? thanks!

All Replies (1)

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All suggestions come from one of your address books. You have 2 books by default. The Personal and the Collected books.

Find the addresses in the address book and delete them.