This site is configured to load Font Awesome 6 Free. In practice, the icon prefixes that should just work here are:
fasfor solid iconsfarfor regular iconsfabfor brand icons
The site currently loads these bundles:
plugins/font-awesome/v6/solid.cssplugins/font-awesome/v6/regular.cssplugins/font-awesome/v6/brands.cssplugins/font-awesome/v6/icons.css
Recommended Usage
For this site, I would recommend staying with a fairly small visual vocabulary:
fasfor navigation, platform, data, workflow, and interface iconsfarfor lighter utility and metadata iconsfabonly for real company and platform brands
That keeps the site more coherent than pulling in arbitrary icons everywhere.
Recommended Solid Icons
Use fas fa-...
Recommended Regular Icons
Use far fa-...
Recommended Brand Icons
Use fab fa-...
Loaded But Not Recommended
These may technically exist in the current Font Awesome bundle, but I would avoid them for normal site work because they are visually weak, dated, overly specific, or inconsistent with the rest of the design:
fab fa-mixcloudfas fa-fighter-jetfas fa-dicefas fa-dice-d6fas fa-headphones-altfas fa-laptop-housefas fa-thumbs-upfas fa-tty
What Will Not Work By Default
The site does not currently load the Font Awesome Pro or extended style bundles. In practice, that means you should avoid relying on prefixes such as:
falfatfadfassfasr
If you want those styles, the corresponding CSS bundles would need to be added explicitly.
Practical Rule
If you are editing page content or menu metadata in this site, the safest choices are:
fas fa-dnafas fa-flaskfas fa-serverfas fa-sitemapfas fa-tablefas fa-brainfas fa-layer-groupfas fa-users-cogfar fa-user-circlefar fa-calendar-altfar fa-clockfab fa-linkedinfab fa-github
That set is already in use across the site or sits comfortably beside the existing visual language.