# Light MD Viewer

> View and edit Markdown files directly in your browser with syntax highlighting, mermaid diagrams, and split editor.

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

## Overview

- **ID:** `light-md-viewer`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Hayyarden
- **Category:** web-development,appearance
- **Daily users:** 24
- **Weekly downloads:** 15
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.0.1
- **Last updated:** 2026-05-04
- **First published:** 2026-05-01
- **Size:** 1.37 MB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/light-md-viewer/)

## Description

A lightweight extension that renders Markdown files directly in the browser with syntax highlighting, mermaid diagrams, and a built-in editor.

Features

View mode — clean, readable rendering of .md files with Material Design styling
Edit mode — full CodeMirror 6 editor with GFM syntax highlighting and line numbers
Split mode — side-by-side editor and live preview
Code highlighting — automatic syntax detection for fenced code blocks via highlight.js
Mermaid diagrams — flowcharts, sequence diagrams, and more rendered inline
Export options — download edited files, copy raw markdown or rendered HTML to clipboard
Fully offline — all libraries are bundled locally, no network requests

## Rankings

- #22,721 — Overall
- #123 — viewer
- #129 — light
- #191 — delight
- #218 — flight

## Permissions and access

### Permissions

- `downloads`

### Host permissions

- `file:///*/*.md`
- `file:///*/*.markdown`
- `file:///*/*.mdown`

### Content script matches

- ``

## Safety

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

### Analysis details

- Injects scripts into web pages, which may alter or extract site contents, resulting in a substantial risk.
- 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/light-md-viewer)