Who should use Customizer styles and scripts?

Customizer styles and scripts is a consumer product built for firefox users who customize website appearance and scripts.

Does Customizer styles and scripts have a free plan?

Yes — Customizer styles and scripts is free to use.

What platforms does Customizer styles and scripts run on?

Customizer styles and scripts runs on the web, embeddable surfaces, and Android.

Is Customizer styles and scripts still maintained?

Unverified. Customizer styles and scripts has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What are alternatives to Customizer styles and scripts?

Similar projects tracked by PulseGate include Site Customizer, Custom CSS, and Custom CSS.

Who develops Customizer styles and scripts?

Customizer styles and scripts is developed by Rico.

How long has Customizer styles and scripts been around?

Customizer styles and scripts first shipped in 2024.

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Customizer styles and scripts

Name: Customizer styles and scripts
Author: Rico

mozilla.orgBrowser DevTools & extensions

Customizer styles and scripts is a Firefox extension that lets users apply custom CSS to websites, adjust fonts and colors, and run JavaScript when pages reload. It is intended for Firefox users who want to personalize or modify site behavior.

FreeWebEmbeddableAndroid

Visit mozilla.org

Overview

6 features

In the Browser DevTools & extensions space, Customizer styles and scripts takes a focused approach. It focuses on changing website appearance and behavior without editing each site's source code. It is built as a consumer product for firefox users who customize website appearance and scripts. It is available for free. It ships for the web, embeddable surfaces, and Android.

Behind Customizer styles and scripts is Rico, and it first shipped in 2024. Key capabilities include Custom CSS, Custom JavaScript, and font resizing. The interface is available in 32 languages, including Czech, German, and Greek.

Summary written by a language model from the project’s public pages.

Custom CSS
Custom JavaScript
Font resizing
Font colors
Page styling
Site-specific rules

Built with & integrations

Runs on

BrowserEmbeddableAndroid

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed16 Sep · 00:17 UTC
Customizer styles and scripts verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Customizer styles and scripts

What is Customizer styles and scripts?: Customizer styles and scripts focuses on changing website appearance and behavior without editing each site's source code. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use Customizer styles and scripts?: Customizer styles and scripts is a consumer product built for firefox users who customize website appearance and scripts.
Does Customizer styles and scripts have a free plan?: Yes — Customizer styles and scripts is free to use.
What platforms does Customizer styles and scripts run on?: Customizer styles and scripts runs on the web, embeddable surfaces, and Android.
Is Customizer styles and scripts still maintained?: Unverified. Customizer styles and scripts has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What are alternatives to Customizer styles and scripts?: Similar projects tracked by PulseGate include Site Customizer, Custom CSS, and Custom CSS.Site Customizer Custom CSS Custom CSS
Who develops Customizer styles and scripts?: Customizer styles and scripts is developed by Rico.
How long has Customizer styles and scripts been around?: Customizer styles and scripts first shipped in 2024.

At a glance

Pricing: Free
Platforms: Web
Built for: Firefox users who customize website appearance and scripts
Model: B2C
Solves: Changing website appearance and behavior without editing each site's source code.

Registered as

Firefox Add-ons: customizer-styles-and-scripts

Developer

Rico

Index record

Indexed: 16 Sep 2026
Lifecycle: Alive
Last seen: 16 Sep 2026

Identity audit (13)

Slug: customizer-styles-and-scripts-mozilla-org
Lifecycle state recorded: 16 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 16 Sep 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 16 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/customizer-styles-and-scripts

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