Edit drop down list

I have a misspelled word in one of my drop down lists, how can I remove just the one item?

Hi,

do you mean Avast passwords dropdown list? Please specify it in more details. Thanks

Not the password list, just one of the autofill boxes, click on the box and the drop down list appears, I want to edit this list.

Ok, try go to settings → Privacy page… There is autofill section.