Fira Sans
Type with Purpose
Good typography guides attention, improves understanding, and makes communication effortless.
The Anatomy of a Typeface
By FontSide · June 2026
Every typeface is a system of decisions — about stroke contrast, x-height, spacing, and rhythm. The best ones feel invisible: you stop seeing the letters and start hearing the voice behind them. That transparency is the hardest thing to design.
A high x-height opens up the counters and makes small text breathe. Tight tracking pulls a headline together; loose tracking gives a caption room to exhale. None of these choices are accidents — they are arguments about how reading should feel.
Uppercase
Lowercase
Numerals
Symbols
Configuration
Select the weights and styles you want to include in your project.
Weights
Styles
Package Manager
The recommended way to use fonts in modern web projects.
1. Install Package
pnpm add @fontsource/fira-sans2. Import in App
// Please select at least one weight and style3. CSS Usage
body {
font-family: "Fira Sans", sans-serif;
}Google Fonts CDN
Use Google's CDN to embed the fonts directly via HTML.
HTML <head>
<!-- Please select at least one weight and style -->Fontsource CDN
Skip the build step by adding this directly to your global CSS file.
Global CSS
/* Please select at least one weight and style */Background & Story
Designed to integrate with the character of the Mozilla FirefoxOS, the Fira typefaces also aim to cover the legibility needs for a large range of handsets varying in screen quality and rendering.
The Fira font family comes in 3 widths, all accompanied by italic styles. The package also includes a Mono Spaced variant.
This project is led by Carrois, a type foundry based in Berlin. To contribute, see github.com/mozilla/Fira
Tags & Moods
Subsets
Install
pnpm add @fontsource/fira-sansDesigned by
Carrois Apostrophe
Links
License
OFL-1.1