url-confirmation-func

url-confirmation-func is a variable defined in `url-vars.el'.
Its value is

y-or-n-p

Documentation:
What function to use for asking yes or no functions.
Possible values are `yes-or-no-p' or `y-or-n-p', or any function that
takes a single argument (the prompt), and returns t only if a positive
answer is given.

You can customize this variable.