Hi, for some reason Firefox doesn't display a lot of fonts for me. Here's a list of the fonts, that I've found that aren't being displayed: serif xx-large, serif, fantasy, helvetica, Andale Mono, Vera Serif, Vera Sans, Vera Sans Chrome, Edge and (because why not) Internet explorer all seem to render these just fine Any help is very much appreciated! I'm on Firefox 138.0.4; Windows 10 Edit: Turns out, I was sort of the issue. My main issue was with Sites using Helvetica, as I found the readability of those sites to be atrocious. As it turns out, Firefox was the only one of my browsers actually using Helvetica (I do have Helvetica installed). Sites that have Helvetica first in their font-families would actually be displayed using Helvetica. I changed "layout.css.font-visibility" to 2 and now those sites just use Arial So the conclusion is, that I actually just hate Helvetica...