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With this extension, you can accurately set the font sizes and names of your system interface.
Last updated on : 2026-02-09
Browser Versions
IE
Edge
Firefox
Chrome
Safari
Opera
Fully Supported
Partially
No Support
ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for font-family on IE is not supported on any IE versions.
ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for font-family on Edge is not supported on any Edge versions.
ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for font-family on Firefox is not supported on any Firefox versions.
ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for font-family on Chrome is not supported on any Chrome versions.
ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for font-family on Safari is fully supported on 13.1-26.3, and not supported on 3.2-13 Safari versions.
ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for font-family on Opera is not supported on any Opera versions.
ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for font-family on Safari on iOS is fully supported on 13.4-26.3, and not supported on 3.2-13.3 Safari on iOS versions.
ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for font-family on Android Browser is not supported on any Android Browser versions.
ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for font-family on Opera Mobile is not supported on any Opera Mobile versions.
ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for font-family on Chrome for Android is not supported on any Chrome for Android versions.
ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for font-family on Firefox for Android is not supported on any Firefox for Android versions.
ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for font-family on Samsung Internet is not supported on any Samsung Internet versions.
Data sourced from
Overall Browser Compatibility Score
Note:ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for font-family shows a browser compatibility score of 17. This is a collective score out of 100 to represent browser support of a web technology. The higher this score is, the greater is the browser compatibility. The browser compatibility score is not a 100% reflection for every browser and the web technology support. However, it does give you an estimate on how much you should rely on a particular web technology in terms of browser compatibility.
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