Is NotebookLM Source safe to install?

What data it declares

The developer declares that it collects these kinds of data:

• Personally identifiable information such as name, address, email address or age
• Authentication information such as passwords, credentials or PIN codes
• Personal communications such as emails, texts or chat messages
• Web history the list of pages you visit
• Website content such as text, images or links on the pages you open

The developer also certifies that your data is not sold to third parties outside approved uses, not used for purposes unrelated to the extension's core function, and not used to decide creditworthiness or lending.

The listing links to a privacy policy.

This is the developer's own declaration in the Chrome Web Store. We cannot check it against what the extension does.

What Chrome asks you to allow

When you add it, Chrome asks you to allow it to:

• Read and change all your data on all websites
• Block content on any page
• Manage your downloads
• Read your browsing history

Derived from the manifest by Chrome's documented rules; the dialog's exact wording depends on your Chrome version and language. Chrome asks again if an update requests more.

What it can reach

Every site you visit. This extension can read and change the content of any page you open. What access to every site means

Reaches your browsing data or every site

• Read and change cookies on the sites it can access cookies
• See the address and title of every tab you have open tabs
• Watch the network requests your browser makes webRequest

Worth knowing

• Block or redirect requests by rules it declares in advance declarativeNetRequest
• Block or redirect requests on the sites it can access declarativeNetRequestWithHostAccess
• Manage your downloads downloads
• Run its own code on the pages it can access scripting

Routine for an extension

• Schedule work to run later alarms
• Run work in a hidden page offscreen
• Open a panel beside the page sidePanel
• Store data in your browser storage

Pages it runs its code on

It runs its own code on specific pages only: 12 site patterns.

• http://0.0.0.0/* only 0.0.0.0
• http://127.0.0.1/* only 127.0.0.1
• http://localhost/* only localhost

A content script is code the extension injects into pages matching these patterns. On those pages it can read and change what you see, whether or not a host permission is listed above.

Sites that can connect to it

Web pages matching these patterns can open a messaging channel to it: 2 site patterns.

• https://notebooklmsource.com/* only notebooklmsource.com
• https://www.notebooklmsource.com/* only www.notebooklmsource.com

Declared as externally connectable in the manifest: a page on these sites can exchange messages with the extension, for example to tell it you have signed in. It does not give the page access to your browser.

How usual this is for its category

In Productivity · Tools, 20% of extensions ask for access to every site. This one: Access to every site.

The typical extension there declares 3 browser permissions; this one declares 11 browser permissions.

• Read and change cookies on the sites it can access (cookies): 5% of extensions in this category ask for it.
• See the address and title of every tab you have open (tabs): 28% of extensions in this category ask for it.
• Watch the network requests your browser makes (webRequest): 3% of extensions in this category ask for it.

Counted over the live extensions of the same category after our latest full pass of the store. A share is context, not a verdict: what is normal depends on what the extension is for.

Who uses it and how it is kept up

82 users

• Last updated in the store 31 days ago, on 2026-10-03.
• We have seen 1 new version in the last 90 days.

What the store shows

• Featured The store's badge for extensions that follow its recommended practices for Chrome extensions.
• Established publisher The store's badge for publishers with a good record and no history of violations.

Has it asked for more over time?

This is the question a permission list on its own cannot answer. An extension that shipped narrow and widened later is a different proposition from one that always asked for the same thing.

The permissions this extension requests have not changed since we started watching it.

Versions we have seen

1. 2026-10-03Version 1.0.2

Who publishes it

frosty41200. This listing has been in the store since 2026-02-19 and was last updated on 2026-10-03.

Similar extensions that ask for less

Listings close to this one in what they say they do, which declare less reach. Less reach is not a verdict on either: compare what each needs for the job.

1. GeminiNotebook-Source-Management No site access · 2 permissions 379 users ★ 4.2
2. NotebookLM Manager Access to specific sites only · 2 site patterns 896 users ★ 4.2
3. NotebookLM Source Manager Access to specific sites only · 4 permissions, 1 site pattern 51 users

How to check or remove it in Chrome

1. Type chrome://extensions in the address bar and find the extension in the list.
2. Open its details. The site access setting shows where it can run; set it to run only on click and it reaches a page only after you press its icon.
3. To uninstall it, choose Remove on the same page.

Questions people ask

What can NotebookLM Source access?

Every site you visit. This extension can read and change the content of any page you open. It declares 11 browser permissions.

What data does NotebookLM Source collect?

The developer declares that it collects these kinds of data: Personally identifiable information, Authentication information, Personal communications, Web history, Website content. This is the developer's own declaration in the Chrome Web Store. We cannot check it against what the extension does.

Has NotebookLM Source asked for more permissions over time?

The permissions this extension requests have not changed since we started watching it.

Does NotebookLM Source publish a privacy policy?

Yes, the store listing links to a privacy policy.