The file you mentioned, 6.0.0-alpha2 , is a very early, pre-production version from late 2021.
: Downloading .zip files from non-official repositories (like file-sharing sites) is a common way for malware to be distributed. fontawesome-pro-6.0.0-alpha2.zip
: 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. The file you mentioned, 6