Who should use CSS Editor?

CSS Editor is a consumer product built for firefox users and web designers.

Does CSS Editor have a free plan?

Yes — CSS Editor is free to use.

What platforms does CSS Editor run on?

CSS Editor runs on the web and embeddable surfaces.

Is CSS Editor still active?

Unverified. CSS Editor 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 projects are similar to CSS Editor?

Similar projects tracked by PulseGate include CSS Editor, Web Edit, and Live CSS Editor Plus.

Who makes CSS Editor?

CSS Editor is developed by Kuwin.

How long has CSS Editor been around?

CSS Editor first shipped in 2024.

Back to the index

CSS Editor

Name: CSS Editor
Author: Kuwin

mozilla.orgBrowser DevTools & extensions

CSS Editor is a Firefox extension for editing website styles directly in the browser. Users can select page elements and adjust properties such as fonts and colors without modifying source files.

FreeWebEmbeddable

Visit mozilla.org

Overview

5 features

In the Browser DevTools & extensions space, CSS Editor takes a focused approach. It focuses on editing and previewing website CSS without manually changing source files or writing code. CSS Editor is a consumer product aimed at firefox users and web designers. CSS Editor costs nothing to use. It runs on the web and embeddable surfaces.

It is developed by Kuwin, and it first shipped in 2024. Key capabilities include Live CSS editing, element selection, and font adjustment. The interface is available in 32 languages, including Czech, German, and Greek.

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

Live CSS editing
Element selection
Font adjustment
Color adjustment
Browser-based editing

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed20 Sep · 02:12 UTC
CSS Editor verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about CSS Editor

What does CSS Editor do?: CSS Editor focuses on editing and previewing website CSS without manually changing source files or writing code. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use CSS Editor?: CSS Editor is a consumer product built for firefox users and web designers.
Does CSS Editor have a free plan?: Yes — CSS Editor is free to use.
What platforms does CSS Editor run on?: CSS Editor runs on the web and embeddable surfaces.
Is CSS Editor still active?: Unverified. CSS Editor 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 projects are similar to CSS Editor?: Similar projects tracked by PulseGate include CSS Editor, Web Edit, and Live CSS Editor Plus.CSS Editor Web Edit Live CSS Editor Plus
Who makes CSS Editor?: CSS Editor is developed by Kuwin.
How long has CSS Editor been around?: CSS Editor first shipped in 2024.

At a glance

Pricing: Free
Platforms: Web
Built for: Firefox users and web designers
Model: B2C
Solves: Editing and previewing website CSS without manually changing source files or writing code.

Registered as

Firefox Add-ons: css-editor

Developer

Kuwin

Index record

Indexed: 20 Sep 2026
Lifecycle: Alive
Last seen: 20 Sep 2026

Identity audit (13)

Slug: css-editor-mozilla-org
Lifecycle state recorded: 20 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 20 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: 20 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/css-editor

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