为FirefoxOS设计开发的一款等宽字体，结合了FirefoxOS的很多特性。值得称道的是该字体在设计时就兼顾了在各种分辨率下的易读性。
| 文件名 | 文件大小 |
| FiraMono-Bold-1.ttf | 201KB |
| FiraMono-Medium-2.ttf | 169KB |
| FiraMono-Regular-3.ttf | 170KB |
| FiraSans-Bold-4.ttf | 427KB |
| FiraSans-BoldItalic-5.ttf | 437KB |
| FiraSans-Book-6.ttf | 394KB |
| FiraSans-BookItalic-7.ttf | 402KB |
| FiraSans-Eight-12.ttf | 380KB |
| FiraSans-EightItalic-13.ttf | 389KB |
| FiraSans-ExtraBold-14.ttf | 436KB |
| FiraSans-ExtraBoldItalic-15.ttf | 446KB |
| FiraSans-ExtraLight-16.ttf | 385KB |
| FiraSans-ExtraLightItalic-17.ttf | 393KB |
| FiraSans-Four-18.ttf | 375KB |
| FiraSans-FourItalic-19.ttf | 389KB |
| FiraSans-HairItalic-21.ttf | 401KB |
| FiraSans-HeavyItalic-23.ttf | 456KB |
| FiraSans-Hair-25.ttf | 390KB |
| FiraSans-Heavy-26.ttf | 447KB |
| FiraSans-Italic-28.ttf | 401KB |
| FiraSans-Light-29.ttf | 387KB |
| FiraSans-LightItalic-30.ttf | 394KB |
| FiraSans-Medium-31.ttf | 395KB |
| FiraSans-MediumItalic-32.ttf | 403KB |
| FiraSans-Regular-33.ttf | 394KB |
| FiraSans-SemiBold-34.ttf | 427KB |
| FiraSans-SemiBoldItalic-37.ttf | 436KB |
| FiraSans-Thin-38.ttf | 386KB |
| FiraSans-ThinItalic-39.ttf | 393KB |
| FiraSans-Two-40.ttf | 373KB |
| FiraSans-TwoItalic-41.ttf | 382KB |
| FiraSans-Ultra-42.ttf | 473KB |
| FiraSans-UltraItalic-43.ttf | 485KB |
| FiraSans-UltraLight-44.ttf | 384KB |
| FiraSans-UltraLightItalic-46.ttf | 392KB |
若您要将该字体用于商业用途，请与权属方联系并取得书面授权，该授权可能需要您支付相应的版权费用。
