: It introduced the Thin style (extremely light weight) and the Duotone style (multi-colored icons with controllable opacity for each layer).

If you need Font Awesome Pro for a project, the only "proper" and safe way to access it is through the official channels:

: The Pro version grew to include over 16,000 icons , significantly more than the free version.

: It optimized the SVG-with-JS and Web Fonts methods, allowing for "sub-setting" (downloading only the icons you actually use) to improve page load speeds.