What does CSS Viewer do?

Inspecting, collecting, and exporting CSS styles from web pages without manually searching source code. It is catalogued under Browser DevTools & extensions on PulseGate.

Who is CSS Viewer for?

CSS Viewer is a consumer product built for web developers and layout designers.

Yes — CSS Viewer is free to use.

What platforms does CSS Viewer run on?

CSS Viewer runs on the web and embeddable surfaces.

Is CSS Viewer still active?

Unverified. CSS Viewer 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 CSS Viewer?

Similar projects tracked by PulseGate include CSSViewer, CSS Selector, and CSS SCANNER.

Who makes CSS Viewer?

CSS Viewer is developed by Forestier.

How long has CSS Viewer been around?

CSS Viewer first shipped in 2026.

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CSS Viewer

Name: CSS Viewer
Author: Forestier

mozilla.orgBrowser DevTools & extensions

CSS Viewer is a Firefox extension that lets users select elements on web pages and inspect the CSS rules applied to them and their child elements. It highlights selected elements, includes inline styles, and lets users view, copy, or download the collected CSS.

FreeWebEmbeddable

Visit mozilla.org

1alternative

7features

2026since

Overview

7 features

CSS Viewer is a Browser DevTools & extensions project. Inspecting, collecting, and exporting CSS styles from web pages without manually searching source code. CSS Viewer is a consumer product aimed at web developers and layout designers. CSS Viewer costs nothing to use. It ships for the web and embeddable surfaces.

Behind CSS Viewer is Forestier, and it first shipped in 2026. Key capabilities include element highlighting, CSS rule collection, and inline style support. The interface is available in 32 languages, including Czech, German, and Greek.

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

Element highlighting
CSS rule collection
Inline style support
Extension window
Copy to clipboard
CSS file export
Interface localization

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

Indexed16 Sep · 03:50 UTC
CSS Viewer verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about CSS Viewer

What does CSS Viewer do?: Inspecting, collecting, and exporting CSS styles from web pages without manually searching source code. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is CSS Viewer for?: CSS Viewer is a consumer product built for web developers and layout designers.
Is CSS Viewer free?: Yes — CSS Viewer is free to use.
What platforms does CSS Viewer run on?: CSS Viewer runs on the web and embeddable surfaces.
Is CSS Viewer still active?: Unverified. CSS Viewer 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 CSS Viewer?: Similar projects tracked by PulseGate include CSSViewer, CSS Selector, and CSS SCANNER.CSSViewer CSS Selector CSS SCANNER
Who makes CSS Viewer?: CSS Viewer is developed by Forestier.
How long has CSS Viewer been around?: CSS Viewer first shipped in 2026.

At a glance

Pricing: Free
Platforms: Web
First seen: 16 Sep 2026
Built for: web developers and layout designers
Model: B2C
Solves: Inspecting, collecting, and exporting CSS styles from web pages without manually searching source code.

Registered as

Firefox Add-ons: css_viewer

Developer

Forestier

Index record

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

Identity audit (13)

Slug: css-viewer-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 (no inferred launch/funding milestones).
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/css_viewer

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