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NotebookLM Extension (Gemini Notebook) - ExtendLM

Chrome extension by ExtendLM · Productivity · Tools

  • Featured
  • Established publisher

A Chrome extension in Productivity · Tools with 60 000 users, an established extension.

Specific sites only: 17 match patterns.

What the developer says, and 5 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
60 000
Rating
4.8 (117 ratings)
Users, last 16 days
unchanged
Rating, last 30 days
Not watched long enough to say
Version
2.5.77
Updated in the store
2026-09-11
Published
2025-12-12
Manifest
V3
Browser access
11 permissions, 17 site patterns

How it has moved

Users
unchanged since 31.08
60k · 4 readings
2026-09-04: released 2.5.552026-09-07: released 2.5.722026-09-11: released 2.5.77
  1. 2026-08-3160k
  2. 2026-09-0560k
  3. 2026-09-1360k
  4. 2026-09-1560k
Rating
+0.008 since 31.08
reviewsrating 4.761-4.769 · 4 readings
2026-09-04: released 2.5.552026-09-07: released 2.5.722026-09-11: released 2.5.77
  1. 2026-08-31reviews113rating4.761
  2. 2026-09-05reviews114rating4.763
  3. 2026-09-13reviews116rating4.767
  4. 2026-09-15reviews117rating4.769
Users
unchanged since 31.08
60k · 4 readings
2026-09-04: released 2.5.552026-09-07: released 2.5.722026-09-11: released 2.5.77
  1. 2026-08-3160k
  2. 2026-09-0560k
  3. 2026-09-1360k
  4. 2026-09-1560k
Rating
+0.008 since 31.08
reviewsrating 4.761-4.769 · 4 readings
2026-09-04: released 2.5.552026-09-07: released 2.5.722026-09-11: released 2.5.77
  1. 2026-08-31reviews113rating4.761
  2. 2026-09-05reviews114rating4.763
  3. 2026-09-13reviews116rating4.767
  4. 2026-09-15reviews117rating4.769

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Specific sites only: 17 match patterns.

  • https://notebook.google.com/*
  • https://notebooklm.google.com/*
  • https://api.extendlm.com/*
Show the remaining 9
  • https://dev.extendlm.com/*
  • https://extendlm.com/*
  • https://www.extendlm.com/*
  • https://accounts.google.com/*
  • https://gemini.google.com/*
  • https://chatgpt.com/*
  • https://chat.openai.com/*
  • https://claude.ai/*
  • https://www.perplexity.ai/*
  • Attach to pages the way developer tools do debugger
  • Capture the contents of a tab tabCapture
  • See the address and title of every tab you have open tabs
Show the remaining 8
  • Manage your downloads downloads
  • Run its own code on the pages it can access scripting
  • Act on the current tab, but only after you click it activeTab
  • Keep running while the browser is open background
  • Add items to the right-click menu contextMenus
  • Run work in a hidden page offscreen
  • Store data in your browser storage
  • Store data in your browser without the usual size limit unlimitedStorage

The full permission history for this extension

Version history

  1. Version 2.5.77
  2. Version 2.5.72
  3. Version 2.5.55

What changed recently

  1. Package size changed
  2. Released version 2.5.77 (was 2.5.72)
  3. Package size changed
Show the remaining 5
  1. Store description rewritten
  2. Released version 2.5.72 (was 2.5.55)
  3. Package size changed
  4. Store description rewritten
  5. Released version 2.5.55 (was 2.5.25)

The publisher

ExtendLM. Listed website: extendlm.com.

Like this one

Listings the catalog judges closest in what they say they do.

  1. NotebookLM Tools for Gemini Notebook™ Describes nearly the same job, with a large installed audience 100k users ★ 4.7
  2. AIExportHub for NotebookLM Describes nearly the same job, smaller audience 63 users ★ 5.0
  3. NotebookLM Source Collector Describes nearly the same job, smaller audience 17 users
  4. Gemini Notebook Web Importer Describes nearly the same job, smaller audience 4k users ★ 3.5
  5. NotebookLM KAI Describes nearly the same job, smaller audience 6 users

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

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Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.