How to put Facebook on Codeforces profile?

Revision en2, by brownfox2k6, 2023-12-02 10:17:47

I see there are some accounts which shows their Facebook. But I can't find where to do it in Settings. Anyone knows how to do it?

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  Rev. Lang. By When Δ Comment
en2 English brownfox2k6 2023-12-02 10:17:47 6
en1 English brownfox2k6 2023-12-02 10:17:32 217 Initial revision (published)