What is Claude in Sidebar?

Reading, explaining, translating, and drafting from webpages without switching browser tabs. It is catalogued under Browser DevTools & extensions on PulseGate.

Who is Claude in Sidebar for?

Claude in Sidebar is a consumer product built for firefox users who use Claude for research, reading, and writing.

Does Claude in Sidebar have a free plan?

Yes — there is a free tier, with paid plans for advanced use.

What platforms does Claude in Sidebar run on?

Claude in Sidebar runs on the web, embeddable surfaces, and Android.

Is Claude in Sidebar still maintained?

Unverified. Claude in Sidebar 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 Claude in Sidebar?

Similar projects tracked by PulseGate include Claude, Open Claude, and Claude for Safari.

Who develops Claude in Sidebar?

Claude in Sidebar is developed by Jadon Mason.

When did Claude in Sidebar launch?

Claude in Sidebar first shipped in 2026.

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Claude in Sidebar

Name: Claude in Sidebar
Author: Jadon Mason

mozilla.orgBrowser DevTools & extensions

Claude in Sidebar is a Firefox extension that places Claude beside the current webpage. It supports article summarization, explanations, translation, fact-checking, and drafting based on on-screen content, and requires a free or paid Claude.ai account.

FreemiumWebEmbeddableAndroidCloud-managed

Visit mozilla.org

Overview

7 features

Claude in Sidebar sits in PulseGate's Browser DevTools & extensions category. Reading, explaining, translating, and drafting from webpages without switching browser tabs. It is built as a consumer product for firefox users who use Claude for research, reading, and writing. A free plan is available. It ships for the web, embeddable surfaces, and Android.

It is developed by Jadon Mason, and it first shipped in 2026. Key capabilities include sidebar chat, article summaries, and code explanations. The interface is available in 32 languages, including Czech, German, and Greek.

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

Sidebar chat
Article summaries
Code explanations
Page translation
Fact checking
Email drafting
Firefox for Android

Built with & integrations

AI providers

anthropic

Runs on

BrowserEmbeddableAndroidCloud-managed

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed8 Sept · 08:43 UTC
Claude verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Claude in Sidebar

What is Claude in Sidebar?: Reading, explaining, translating, and drafting from webpages without switching browser tabs. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Claude in Sidebar for?: Claude in Sidebar is a consumer product built for firefox users who use Claude for research, reading, and writing.
Does Claude in Sidebar have a free plan?: Yes — there is a free tier, with paid plans for advanced use.
What platforms does Claude in Sidebar run on?: Claude in Sidebar runs on the web, embeddable surfaces, and Android.
Is Claude in Sidebar still maintained?: Unverified. Claude in Sidebar 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 Claude in Sidebar?: Similar projects tracked by PulseGate include Claude, Open Claude, and Claude for Safari.Claude Open Claude Claude for Safari
Who develops Claude in Sidebar?: Claude in Sidebar is developed by Jadon Mason.
When did Claude in Sidebar launch?: Claude in Sidebar first shipped in 2026.

At a glance

Pricing: Freemium · pricing page detected
Platforms: Web
First seen: 8 Sept 2026
Built for: Firefox users who use Claude for research, reading, and writing
Model: B2C
Solves: Reading, explaining, translating, and drafting from webpages without switching browser tabs.

Registered as

Firefox Add-ons: claude-in-the-sidebar

Developer

Jadon Mason

Index record

Indexed: 8 Sept 2026
Lifecycle: Alive
First seen: Sept 2026
Last seen: 8 Sept 2026

Identity audit (13)

Slug: claude-mozilla-org
Lifecycle state recorded: 8 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 8 Sept 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: 8 Sept 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/claude-in-the-sidebar

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