Delete information from search boxes or fill in boxes


When I am browsing, and on some websites that have search boxes or boxes to fill in information, when I click on one of those boxes, a drop-down menu appears with several numbers, such as options that I have entered at some point, such as different phone numbers, what I want is to delete the numbers that appear there, leaving only one, I have searched in autocomplete and nothing, how can I do this?

Windows 10

Thank you.

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