# Notion Syntax Highlighter

> Improves Notion's code blocks syntax highlighting + adds tons of theme options

Canonical page: [https://chrome-stats.com/d/notion-syntax-highlighter](https://chrome-stats.com/d/notion-syntax-highlighter)

## Overview

- **ID:** `notion-syntax-highlighter`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Jakub Serwatka
- **Category:** appearance
- **Daily users:** 1
- **Version:** 0.0.10
- **Last updated:** 2026-03-02
- **First published:** 2025-08-02
- **Size:** 180 KB
- **Data as of:** 2026-09-11
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/notion-syntax-highlighter/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/notion-syntax-highlighter/privacy/](https://addons.mozilla.org/firefox/addon/notion-syntax-highlighter/privacy/)

## Description

Improves Notion's code blocks syntax highlighting + adds tons of theme options

🖼️ 245 available themes
🔧 Improved syntax highlighting
🩹 Minor fixes for code blocks
🔓  Open source & free - you can find github repo here: 
       <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/b35654a613c2f54591a1c199d60524a30fb5e7820ae0f06903ea1428795f05d5/https%3A//github.com/JSerwatka/notion-syntax-highlighter" rel="nofollow">https://github.com/JSerwatka/notion-syntax-highlighter</a>

<code>                           🛠️ HOW DOES IT WORK
</code>

<ol><li>Upon installing the extension, the default theme (Gruvbox dark) will be automatically selected.</li><li>To change the theme, simply click on the extension's icon and select a different theme.</li><li>For convenience, only a few themes are visible in the main theme dropdown. To add more, click below the dropdown or right-click on the extension's icon and choose the "Options" menu. On the options page, select the themes you want to appear in your default list.</li></ol>

<code>                                🔐 PRIVACY POLICY
</code>

Notion Syntax Highlighter extension does not analyze or send any user data. All the essential data needed for the extension to function, such as your selected themes and color scheme preferences, are stored locally within your browser.

<code>                      🎁 SUPPORT &amp; CONTRIBUTE
</code>

This extension requires thorough testing, so if you encounter any issues, please report them as bugs here: 
<a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/416ad0a222b7a92d61288cf24a890c831fb03d980b8af00f2e5247d310416383/https%3A//github.com/JSerwatka/notion-syntax-highlighter/issues" rel="nofollow">https://github.com/JSerwatka/notion-syntax-highlighter/issues</a>

You can support this project by:
❤️ Rating it
🤗 Proposing changes and contributing to its development
🐛 Reporting any bugs you encounter

<code>                                🐛 KNOWN ISSUES
</code>

Up-to-date issue list can be found here: 
<a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/a328ca82407a266ccfc1cc3a22aae1dfe6043b20823934cdf88e58a65457b9f2/https%3A//github.com/JSerwatka/notion-syntax-highlighter%23known-issues" rel="nofollow">https://github.com/JSerwatka/notion-syntax-highlighter#known-issues</a>

<code>                            🚀 Future Improvements
</code>

<ul><li>Resolve performance issues related to editing large code blocks</li><li>Add shadow and rounded borders (configurable in settings)</li><li>Add line numbers (configurable in settings)</li><li>Allow line height customization (configurable in settings)</li><li>Support prettier and other code formatters</li><li>Simplify the process of adding new themes</li></ul>

## Rankings

- #110,822 — Overall
- #95 — notion
- #243 — highlighter

## Permissions and access

### Permissions

- `storage`

### Content script matches

- `*.notion.so`

## Safety

- **Risk impact:** Low 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/notion-syntax-highlighter)