Who is DEV-Tools for?

DEV-Tools is a B2B product built for web developers.

Yes — DEV-Tools is free to use.

What platforms does DEV-Tools run on?

DEV-Tools runs on the web and embeddable surfaces.

Is DEV-Tools still maintained?

Unverified. DEV-Tools 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 DEV-Tools?

Similar projects tracked by PulseGate include Devtools (DEPRECATED, DO NOT USE), Inspector DOM Sidebar, and GraphQL DevTools.

Who develops DEV-Tools?

DEV-Tools is developed by Juniper.

When did DEV-Tools launch?

DEV-Tools first shipped in 2022.

Back to the index

DEV-Tools

Name: DEV-Tools
Author: Juniper

mozilla.orgBrowser DevTools & extensions

DEV-Tools is a Firefox browser extension that adds a sidebar to the Developer Tools Inspector. It displays properties of the currently selected markup node as an inspectable object for web developers.

FreeWebEmbeddable

Visit mozilla.org

1alternative

5features

2022since

Overview

5 features

DEV-Tools is a Browser DevTools & extensions project. It focuses on inspecting the current page document and selected DOM nodes directly within Firefox Developer Tools. DEV-Tools is a B2B product aimed at web developers. DEV-Tools costs nothing to use. It runs on the web and embeddable surfaces.

Juniper builds and maintains DEV-Tools, and it first shipped in 2022. Among its 5 catalogued features are inspector sidebar, DOM node inspection, and document object view. The interface is available in 32 languages, including Czech, German, and Greek.

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

Inspector sidebar
DOM node inspection
Document object view
Selection change updates
Developer Tools integration

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

Indexed15 Sep · 17:13 UTC
DEV-Tools verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about DEV-Tools

What does DEV-Tools do?: DEV-Tools focuses on inspecting the current page document and selected DOM nodes directly within Firefox Developer Tools. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is DEV-Tools for?: DEV-Tools is a B2B product built for web developers.
Is DEV-Tools free?: Yes — DEV-Tools is free to use.
What platforms does DEV-Tools run on?: DEV-Tools runs on the web and embeddable surfaces.
Is DEV-Tools still maintained?: Unverified. DEV-Tools 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 DEV-Tools?: Similar projects tracked by PulseGate include Devtools (DEPRECATED, DO NOT USE), Inspector DOM Sidebar, and GraphQL DevTools.Devtools (DEPRECATED, DO NOT USE)Inspector DOM Sidebar GraphQL DevTools
Who develops DEV-Tools?: DEV-Tools is developed by Juniper.
When did DEV-Tools launch?: DEV-Tools first shipped in 2022.

At a glance

Pricing: Free
Platforms: Web
Built for: web developers
Model: B2B
Solves: Inspecting the current page document and selected DOM nodes directly within Firefox Developer Tools.

Registered as

Firefox Add-ons: dev-tools

Developer

Juniper

Index record

Indexed: 15 Sep 2026
Lifecycle: Alive
Last seen: 15 Sep 2026

Identity audit (13)

Slug: dev-tools-mozilla-org
Lifecycle state recorded: 15 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 15 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: 15 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/dev-tools

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