Extending Google NotebookLM with a Chrome Extension: LinkMaster

Vladimir Chernetsov — Wed, 21 May 2025 14:31:34 +0000

Solving real UX gaps in NotebookLM — bulk link handling, YouTube support, and more.

🧠 Why I Built This

I’ve been experimenting with Google NotebookLM, an AI-powered note-taking and research tool that looks promising — especially for summarizing large amounts of information and managing research context.

But while using it extensively, I ran into multiple frustrating limitations that slowed down my workflow. NotebookLM is good — but it's still too basic for serious research work.

As a developer, I couldn't resist the temptation: I built a Chrome Extension to fix the gaps.

🚨 The Problems I Encountered

Here are the key issues I faced as a user of NotebookLM:

🔗 No fast way to add the current page to a NotebookLM document
🎥 No bulk support for YouTube links, including Shorts
🌐 No way to capture all links on a webpage and import them
🗑️ Tedious manual deletion of links inside NotebookLM
🧭 No quick navigation to my active NotebookLM document

These missing features made it hard to use NotebookLM as a serious research tool — especially when dealing with content-heavy workflows like YouTube curation or article collections.

🛠️ What My Extension Notebook LM | LinkMaster Does

So I built a Chrome Extension that adds exactly what NotebookLM is missing:

✅ Features at a Glance

Add current page to your NotebookLM document with one click
Bulk-import YouTube URLs from playlists, channels, or a list
Supports YouTube Shorts (which NotebookLM sometimes fails to parse)
Extract all links from the current page and import them
Mass-remove links directly from your NotebookLM document
Quick access button to jump to your doc without searching

All of this happens without needing to open extra tabs or manually copy/paste URLs.

How Does It Work?

Here’s how it looks in action:

Step 1: Create an Account

Visit NotebookLM — you’ll see the landing page as shown below:

Step 2: Install Notebook LM | LinkMaster from the Chrome Web Store

You’ll see the Chrome extension install page as shown below:

Step 3: Pin the LinkMaster Chrome Extension

Click the pin icon next to the LinkMaster extension, as shown below:

Step 4: Go to the website you want to add to an existing NotebookLM document.

Step 5: Click the LinkMaster button

Click the Notebook LM | LinkMaster extension button, as shown below:

Step 6: You will see the app on the right side of the website

The Notebook LM | LinkMaster panel will appear on the right, as shown below:

Step 7: To add multiple YouTube links

Follow these steps to add multiple YouTube links:

Step 8: To remove multiple links from a NotebookLM document

Follow these steps to delete multiple links:

⚙️ Technical Implementation

This is a browser-only solution using JavaScript and DOM scripting:

Manifest V3 Chrome Extension
Content scripts that hook into the NotebookLM document UI
DOM selectors + MutationObservers to safely manipulate the UI
URL validators and pattern detection (YouTube links, Shorts, etc.)
Lightweight local storage for document URLs