1 34% - How do i undo facebook friend request if i have forgotten the persons name? 2  51% - How can i undo an unfriend request on facebook without that friend knowing? 3  10% - A website that i posted on friends` walls (they wanted it/ fine with me posting it) has now been blocked by facebook.hen in the 2nd open window go to delete previous request. Go to the start menu and select all programs slowly scroll through all the way to the bottom. Then scroll back all the way to the top. After this select your preferential web browser from that menu.