So, it doesn’t work because a cross-domain request is made to the font-file, which fails.
My temporary solution is to fix it so that the URL generated by UAF does not contain the domain name, so it will load relative to root, for instance:
Downsides to this approach? Perhaps make it official?
My fix to plugin_interface.php:
$uaf_upload = wp_upload_dir();
$uaf_upload_dir = $uaf_upload[‘basedir’];
$uaf_upload_dir = $uaf_upload_dir . ‘/useanyfont/’;
$uaf_upload_url = $uaf_upload[‘baseurl’];
$uaf_upload_url = $uaf_upload_url . ‘/useanyfont/’;