Documentation
Configuration / sort_by
When this option lets you change the column to sort the files by this defaults to "name". Valid options are name, size, extension, lastModified. You can also change the sort order.
Example of usage in TinyMCE
tinymce.init({
...
moxiemanager_sort_by: "size"
});
Example of usage in standalone mode
moxman.browse({
...
sort_by: "size"
});