Debug CSS focuses on identifying which page elements and CSS rules are causing web layout problems. It is catalogued under Browser DevTools & extensions on PulseGate.

Who is Debug CSS for?

Debug CSS is a consumer product built for web developers and frontend designers.

Does Debug CSS have a free plan?

Yes — Debug CSS is free to use.

What platforms does Debug CSS run on?

Debug CSS runs on the web and embeddable surfaces.

Is Debug CSS still active?

Unverified. Debug CSS 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 Debug CSS?

Similar projects tracked by PulseGate include CSS Layout Debugger, Toggle CSS outline, and CSS Dig.

Who develops Debug CSS?

Debug CSS is developed by Pranay Joshi.

When did Debug CSS launch?

Debug CSS first shipped in 2015.

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Debug CSS

Name: Debug CSS
Author: Pranay Joshi

mozilla.orgBrowser DevTools & extensions

Debug CSS is a Firefox extension that adds outlines to every element on a webpage so developers can identify layout and positioning issues. It also shows element details when hovering with Ctrl and supports an icon toggle or keyboard shortcut.

FreeMITWebEmbeddable

Visit mozilla.org

3stars

3forks

6features

2015since

Overview

6 features

In the Browser DevTools & extensions space, Debug CSS takes a focused approach. It focuses on identifying which page elements and CSS rules are causing web layout problems. It is built as a consumer product for web developers and frontend designers. It is available for free. It ships for the web and embeddable surfaces.

Behind Debug CSS is Pranay Joshi, and it first shipped in 2015. Among its 6 catalogued features are element outlines, layout debugging, and element details. 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 outlines
Layout debugging
Element details
Hover inspection
Keyboard shortcut
Toolbar toggle

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

License

MIT

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierGitHub · ★ 3Multi-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed10 Sep · 06:23 UTC
Debug CSS verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Debug CSS

What is Debug CSS?: Debug CSS focuses on identifying which page elements and CSS rules are causing web layout problems. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Debug CSS for?: Debug CSS is a consumer product built for web developers and frontend designers.
Does Debug CSS have a free plan?: Yes — Debug CSS is free to use.
What platforms does Debug CSS run on?: Debug CSS runs on the web and embeddable surfaces.
Is Debug CSS still active?: Unverified. Debug CSS 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 Debug CSS?: Similar projects tracked by PulseGate include CSS Layout Debugger, Toggle CSS outline, and CSS Dig.CSS Layout Debugger Toggle CSS outline CSS Dig
Who develops Debug CSS?: Debug CSS is developed by Pranay Joshi.
When did Debug CSS launch?: Debug CSS first shipped in 2015.

At a glance

Pricing: Free
Platforms: Web
Open source: Yes · ★ 3
License: MIT
First seen: 10 Sep 2026
Built for: web developers and frontend designers
Model: B2C
Solves: Identifying which page elements and CSS rules are causing web layout problems.

Registered as

GitHub: pranayjoshicse/VerLim.js
Firefox Add-ons: pranay-joshi

Developer

Pranay Joshi

Small team

GitHub

Open source

View on GitHub

Stars: 3
Forks: 3
Open issues: 0
Last commit: 23 Jul 2015
Commits 90d: 0
Contributors: 2
Authorship: Small team
Default branch: master
Latest release: 2.1 · 23 Jul 2015

Index record

Indexed: 10 Sep 2026
Lifecycle: Alive
First seen: Sep 2026
Last seen: 10 Sep 2026

Identity audit (13)

Slug: debug-css-mozilla-org
Lifecycle state recorded: 10 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 10 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: 10 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/pranay-joshi

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