MantisBT has require_js() and require_css() functions designed to generate lists of external scripts and styles for subsequent inclusion in the HTML document header when it is output. However, these functions only support local links. Support for CDN links will allow to conveniently include headers directly on the pages where specific scripts and styles are needed. If this proposal is implemented, it will be possible to optimize pages with dropzone.js and bootstrap-datetimepicker.js scripts, as well as Viz.js.