NotebookLM Code Highlighter

Name: NotebookLM Code Highlighter
Author: Alex

By: Alex

Adds beautiful syntax highlighting for code blocks in Google NotebookLM. Features auto language detection, 6 color themes, line numbers, and one-click copy

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Features & Capabilities

NotebookLM Code Highlighter transforms plain code blocks in Google NotebookLM into beautifully formatted, syntax-highlighted snippets.

FEATURES • Automatic language detection for 25+ programming languages • 6 color themes: GitHub, VS Code, and Atom One (light & dark variants) • Line numbers for easy reference • One-click copy button • Respects your system's light/dark mode preference • Adjustable max height for long code blocks

SUPPORTED LANGUAGES JavaScript, TypeScript, Python, Java, C, C++, C#, Go, Rust, Ruby, PHP, Swift, Kotlin, SQL, Bash, Shell, JSON, XML, HTML, CSS, SCSS, Markdown, YAML, Dockerfile, GraphQL, and Plain Text.

HOW IT WORKS The extension automatically detects code blocks on notebooklm.google.com and applies syntax highlighting in real-time. You can manually override the detected language using the language picker, and your preference is remembered for that code block.

PRIVACY This extension runs entirely in your browser. It does not collect, store, or transmit any user data. No analytics, no tracking, no ads.

OPEN SOURCE View the source code and report issues on GitHub.

User Growth & Download Statistics

Add-on

By:

Alex

Daily users:

6 1

Version:

1.0.0 Last updated: 2026-01-28

Version code:

6130539

Creation date:

2026-01-25

Risk:

Permissions:

storage
https://notebooklm.google.com/*

Content scripts matches:

localhost
notebooklm.google.com

Size:

4.90MB

Email:

ko*****@gmail.com

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-04

Compare stats and ranking:

Ranking

# 39,978 ▲ 3,243

Other rankings

#37 in notebook keyword 24 #93 in highlighter keyword 51 ▲ 8#207 in code keyword 34 ▲ 21

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Alex

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/notebooklm-code-highlighter/

Email:

ko*****@gmail.com

Website:

https://koval.xyz

Is NotebookLM Code Highlighter Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

NotebookLM Code Highlighter requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Request access to the following domains: google.com, localhost
High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

NotebookLM Code Highlighter may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****