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system-ui value for font-family Browser Compatibility On Mozilla Firefox

The font-family-system-ui property sets a default value of the font family. It may be used to supply a user interface font as fallback when none is specified, such as in cases of font formatting that blocks or otherwise fails to parse correctly.

Last updated on : 2023-03-20

Support for system-ui value for font-family on all Firefox versions

Here’s the support for system-ui value for font-family across all versions of Firefox:

Firefox versions: 113-92

Fully Supported

Firefox versions: 91-43

Partially supported

Firefox versions: 42-2

Not supported

Why Test on Firefox?

To make a right testing strategy it's important to understand how many users are actually using the Firefox browser
To help you build the right browser testing matrix, here's the overall marketshare of both Firefox browser the various versions.

TOP Firefox BROWSERS (Jan 2021 - Jan 2022)

Browser Version

% Share

Release Date

Firefox 105

1.72

2024-12-11

Firefox 106

0.64

2024-12-11

Firefox 104

0.08

2024-12-11

Firefox 102

0.07

2024-12-11

Firefox 103

0.05

2024-12-11

Firefox 52

0.05

2024-12-11

Other

1.46

Data Source: Statcounter.com

ALL DESKTOP BROWSERS (Jan 2021 - Jan 2022)

Browsers

% Share

Chrome

65.24

Safari

19.06

Edge

4.39

Firefox

3.07

Samsung Internet

2.7

Opera

2.5

Other

3.04

Data Source: Statcounter.com

Browser Versions

Edge

Firefox

Chrome

Safari

Opera

5.5 - 11

12 - 18

79 - 111

2 - 42

43 - 91

92 - 113

4 - 52

53 - 55

56 - 114

3.2 - 8

9.1 - 10.1

11 - 16.4

9.5 - 42

43 - 95

Fully Supported

Partially

No Support

About Mozilla Firefox

The Mozilla Corporation & its subsidiary, the Mozilla Corporation, developed Mozilla Firefox, or simply Firefox, a free and open-source web browser. Firefox displays web pages using the Gecko rendering engine, adhering to current and future web standards. It is a significant player in the market.

Mozilla Firefox was created in 2002 under the code name "Phoenix" by Mozilla community members who wanted more than a single program in their Mozilla Application Suite bundle. Firefox's beta version gained popularity with testers and was praised for its speed, security, and add-ons compared to Microsoft's then-dominant Internet Explorer 6.

In 2004, Mozilla released Firefox, challenging Internet Explorer's dominance. In nine months, Firefox had been downloaded more than 60 million times. Firefox is the successor of Netscape Navigator as it was created by Netscape in 1998 before its acquisition by AOL.

Firefox comes with a few useful features. For example, Firefox has tabbed browsing with individual processes per tab, a built-in pop-up blocker, private browsing, phishing detection, and a sandbox security model. One feature of Firefox that's vital to some users is that it works on multiple platforms.

Download Mozilla Firefox

Visit the official website of Mozilla Firefox to download the Firefox browser version.

Resources:

Data sourced from

Latest Firefox version: 113

Fully Supported

system-ui value for font-family is Fully Supported in Firefox. To ensure it works seamlessly on your website or web app, test your site’s URL on Firefox using LambdaTest.

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