# Claude Chat Width Customizer

> Claude.AI ... tired of Claude's narrow default chat? Expand your conversations to fill your screen. Slider control, quick presets, and theme options — all without touching the sidebar. Your settings sync across all Claude tabs instantly!

Canonical page: [https://chrome-stats.com/d/claude-chat-width-customizer](https://chrome-stats.com/d/claude-chat-width-customizer)

## Overview

- **ID:** `claude-chat-width-customizer`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** DoubleGate
- **Category:** appearance
- **Daily users:** 149
- **Weekly downloads:** 6
- **Rating:** 5.00 / 5 (3 ratings)
- **Version:** 1.7.0
- **Last updated:** 2026-01-11
- **First published:** 2026-01-06
- **Size:** 138 KB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/claude-chat-width-customizer/)
- **Website:** [https://github.com/doublegate/claude-width-extension](https://github.com/doublegate/claude-width-extension)

## Description

<strong>More screen. More Claude.</strong> Give your conversations room to breathe—expand the chat area from 40% to full-screen width with an intuitive slider or one-click presets. Perfect for ultra-wide monitors and power users who want more from every session.

<strong>Key Features:</strong>
  - <strong>Adjustable slider</strong> for precise width control (40-100%)
  - <strong>Quick presets</strong>: Narrow (50%), Medium (70%), Wide (85%), Full (100%)
  - <strong>Real-time preview</strong> as you adjust
  - <strong>Theme support</strong>: Light, Dark, or System (follows your OS preference)
  - <strong>Instant sync</strong> across all open Claude tabs
  - <strong>Sidebar-safe</strong>: Only the main chat area changes—navigation stays untouched
  - <strong>Privacy-first</strong>: All settings stored locally, zero data collection

<strong>How It Works:</strong>
  Click the extension icon while on <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/749f55679c25c240feed4c33d337c9a6fd364a96bdf82dafdc769bc8883d8fcd/http%3A//claude.ai" rel="nofollow">claude.ai</a>, drag the slider or tap a preset, and watch your chat expand instantly. Your preference saves automatically and persists across browser sessions.

<strong>Open Source</strong>
  This extension is free and open source. View the code, report issues, or contribute on <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/5b7fbecb386524fbb9341ce51ac7cc36ae923c1f5cf3ca35ee49c84905d9049f/https%3A//github.com/doublegate/claude-width-extension" rel="nofollow">GitHub</a>.

## Rankings

- #9,517 — Overall
- #12 — customize
- #28 — claude
- #35 — claude ai
- #80 — custom feed
- #83 — chat

## Permissions and access

### Permissions

- `storage`
- `activeTab`
- `tabs`
- `contextMenus`

### Content script matches

- `claude.ai`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/claude-chat-width-customizer)