# Markdown Viewer Pro

> The cleanest way to read Markdown in Firefox — open any .md file locally or on the web and get a beautifully rendered, fully interactive document instantly.

Canonical page: [https://chrome-stats.com/d/markdown-viewer-pro](https://chrome-stats.com/d/markdown-viewer-pro)

## Overview

- **ID:** `markdown-viewer-pro`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Soul in Silicon
- **Category:** other
- **Daily users:** 11
- **Weekly downloads:** 1
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.0.0
- **Last updated:** 2026-04-05
- **First published:** 2026-04-02
- **Size:** 83 KB
- **Data as of:** 2026-09-14
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/markdown-viewer-pro/)

## Description

✨ Why Markdown Viewer Pro?

Most browsers show Markdown files as raw, unformatted text. Markdown Viewer Pro transforms them into polished, readable documents — with zero configuration required. Whether you're reviewing a project README, reading documentation, or writing notes, your files look exactly as intended.

🚀 Key Features

Beautiful Rendering
<ul><li><strong>GitHub-Flavored Markdown</strong> — headings, bold/italic, tables, task lists, strikethrough, blockquotes, and more rendered flawlessly</li><li><strong>Syntax-highlighted code blocks</strong> — 180+ languages powered by highlight.js with GitHub's signature colour themes</li><li><strong>Smart typography</strong> — curly quotes, em-dashes, and ellipses automatically applied</li></ul>
Dark &amp; Light Themes
<ul><li>Toggle between <strong>light and dark mode</strong> with a single click — or press <code>D</code></li><li>GitHub-accurate colour palettes for both themes, including syntax highlighting</li><li>Your preference is <strong>remembered</strong> across sessions</li></ul>
Navigation &amp; Reading
<ul><li><strong>Auto-generated Table of Contents</strong> — jump to any section instantly, toggle with <code>T</code></li><li><strong>Reading progress bar</strong> — always know how far through a document you are</li><li><strong>Heading anchor links</strong> — hover any heading to copy a direct link</li><li><strong>Smooth scroll</strong> to sections from the TOC</li></ul>
Developer Friendly
<ul><li><strong>Copy the raw Markdown source</strong> in one click</li><li><strong>Per-block code copy</strong> button on every code block (appears on hover)</li><li><strong>External links</strong> automatically open in a new tab</li><li>Works on local files (<code>file://</code>) <strong>and</strong> web-hosted <code>.md</code> URLs</li></ul>
Fully Customisable
<ul><li><strong>Font size controls</strong> — A− and A+ buttons to find your perfect reading size</li><li><strong>Line width</strong> — choose narrow, normal, wide, or full-width layouts</li><li><strong>Settings panel</strong> — all preferences accessible from the toolbar icon</li><li>Everything <strong>persisted</strong> via browser storage — your setup survives restarts</li></ul>
Print Ready
<ul><li>Toolbar, TOC, and buttons are automatically hidden when printing</li><li>Link URLs are expanded inline so printed copies remain useful</li></ul>

🔒 Privacy &amp; Security
<ul><li><strong>Zero data collection</strong> — no analytics, no telemetry, no network requests</li><li>All rendering happens <strong>100% locally</strong> in your browser</li><li>Dangerous URLs (<code>javascript:</code>, <code>data:</code>) in Markdown are automatically blocked</li><li>Minimal permissions: only what is strictly necessary to render files</li></ul>
<strong>Permissions requested:</strong>

| Permission | Why |
|---|---|
| <code>file:///*</code> | Read local <code>.md</code> files you open |
| <code>storage</code> | Save your display preferences |
| <code>activeTab</code> | Show file status in the popup |
| <code>clipboardWrite</code> | Copy source / copy code buttons |

⌨️ Keyboard Shortcuts

| Key | Action |
|-----|--------|
| <code>T</code> | Toggle Table of Contents |
| <code>D</code> | Toggle Dark / Light mode |

📂 Supported File Extensions

<code>.md</code> · <code>.markdown</code> · <code>.mdown</code> · <code>.mkd</code> · <code>.mkdn</code>

## Rankings

- #32,175 — Overall
- #173 — viewer

## Permissions and access

### Permissions

- `file:///*`
- `storage`
- `activeTab`
- `clipboardWrite`

### Content script matches

- ``
- `*`

## Safety

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

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- 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/markdown-viewer-pro)