Set Wordpress default media options that WON'T get overridden by user cookies

functions.php

add_action( 'admin_head-post.php', '_my_reset_image_insert_settings' );
add_action( 'admin_head-post-new.php', '_my_reset_image_insert_settings' );
function _my_reset_image_insert_settings() {
  ?>
    <script>
      if ( typeof setUserSetting !== 'undefined' ) {
        setUserSetting( 'align', 'none' ); // none || left || center || right
        setUserSetting( 'imgsize', 'medium' ); // thumbnail || medium || large || full
        setUserSetting( 'urlbutton', 'none' ); // none || file || post
      }
    </script>
  <?php
}