Perplexity AI Font Fix

Forces sans-serif fonts on Perplexity AI web UI to override serif changes

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         Perplexity AI Font Fix
// @namespace    perplexity-ugly-font-fix
// @version      1.0
// @description  Forces sans-serif fonts on Perplexity AI web UI to override serif changes
// @author       brosStyle
// @match        https://www.perplexity.ai/*
// @grant        none
// @license      MIT
// @run-at       document-start
// ==/UserScript==

(function() {
    'use strict';

    const style = document.createElement('style');
    style.textContent = `
        :root {
            --font-primary: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif !important;
            --font-secondary: inherit !important;
        }
        *, *::before, *::after {
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif !important;
            font-feature-settings: normal !important;
        }
        [class*="prose"], [class*="answer"], .ProseMirror {
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif !important;
            font-weight: 400 !important;
            line-height: 1.6 !important;
        }

        @font-face {
            font-family: 'serif-font-bad' !important;
            src: none !important;
            font-display: block !important;
        }
    `;
    document.head.appendChild(style);

    const observer = new MutationObserver(() => {
        document.querySelectorAll('*').forEach(el => {
            if (el.style.fontFamily && el.style.fontFamily.includes('serif')) {
                el.style.fontFamily = 'system-ui, -apple-system, "Segoe UI", Roboto, sans-serif';
            }
        });
    });
    observer.observe(document.body, { childList: true, subtree: true });
})();