<a href="https://github.com/kencrocken/FiraCodeiScript" target="_blank" rel="noopener nofollow">Fira Code iScript</a> variation takes the Regular and Bold face styles from <a href="https://github.com/tonsky/FiraCode" target="_blank" rel="noopener nofollow">Fira Code</a> and replaces italics with the script font <a href="https://font.download/font/script12-bt" target="_blank" rel="noopener nofollow">Script12</a> from Bitstream. The resulting font clearly indicates italicized elements in your IDE. (If you toggle off italics in your IDE theme, you’ll still get stock Fira Code.)
Fira Code is based on Fira Mono, originally created by the Mozilla Foundation. It was developed to ease visually parsing complex code. Fira Code maintains ASCII compatibility while supporting most IDE ligatures. It visually distinguishes similar characters like ‘0’ (zero) and ‘O’ (capital O). Its primary feature is the use of ligatures, which replace common multi-character programming sequences—such as -&gt;, &lt;=, ===, or !=—with single, visually optimized symbols, increasing reading speed and reducing cognitive load during coding sessions.
<img src="https://media.daily.dev/image/upload/s--LvwgoRdV--/f_auto/v1757634389/ugc/content_9b8ac558-052d-402f-9933-2adabde52a06?_a=BAMClqZW0" alt="30752894-b5ff4b4a-9f8b-11e7-9908-969829409d08">

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Fira Code iScript is a font variation that combines Fira Code's regular and bold styles with Script12 italics to improve code readability. The font maintains ASCII compatibility, supports IDE ligatures, and uses visual symbols to replace common programming sequences like arrows and comparison operators, helping developers read code faster with reduced cognitive load.

Fira Code iScript, to make reading code faster

I used to think that FiraCode was the best coding font for many years, never giving it much thought as it was suggested by most. And it looked great, of course, until I ran into a weird bug where I could not easily distinguish between the square and curly brackets. I’m definitely older and my eyesight is not what it used to be, but even with the best syntax color highlighting and extensions such as rainbow brackets, it was still an issue for me, so I switched to IBM Plex Mono and never looked back. Try typing in your editor something like <code>{{[]()}}</code> and see if it’s readable, especially in smaller font sizes. Other than this, in 2025 all monospace fonts for coding should definitely have a distinct zero and ligatures by default.
It never seizes to amaze me how little attention most developers pay to their coding fonts and themes. Themes in particular is another big topic, but not related to this article. The screenshots in this article are so terrible it hurts and they illustrate precisely what’s wrong with the most popular themes these days.

I used FiraCode plenty in my career. And this is my style with block &amp; handwritten text mixed in my editor 🤪 like a crazy person.
Maybe I’ll give this a shot, haven’t changed fonts in a while 👌🏻

It takes a bit of tinkering with the IDE tokenizer rules to set this up properly for each language, if you are using multiple languages, but it’s worth it. The clarity of thought it provides after getting used to is serious.
I had used this for a while but the lack of it in devices other than mine and no support in web IDE environments made me feel impaired at times during work.
So I switched back to simpler alternatives.

<a href="https://github.com/kencrocken/FiraCodeiScript" target="_blank" rel="noopener nofollow">Last commit 8 years ago</a>.

This looks way too fancy for me. 😂