Extension Tracker

Gemini Notebook (NotebookLM) Extension - ExtendLM

40,000 users Rated 4.91 from 139 ratings Last updated 8 Nov 2026

By ExtendLM Live in the Chrome Web Store jefclkefiknlccjcjmkkhlcfkdgcmgcm Search Google ↗ Last checked 9 Nov 2026, 05:46 UTC

The listing

What the Chrome Web Store shows, as of the last check

Gemini Notebook extension: folders, tags, custom prompts, bulk notebook and source management, merging, bulk imports and more.Summary from the listing
Developer
ExtendLM
Enhanced Safe Browsing
Trusted. What this means →
Category
Productivity › Tools
First published
12 Dec 2025
Last updated
8 Nov 2026
Version
2.7.55
Size
10.54 MiB
Minimum Chrome
88
Languages
27 languages

Deutsch, English, English (Australia), English (United Kingdom), English (United States), Indonesia, Nederlands, Tiếng Việt, Türkçe, español, español (Latinoamérica), français, italiano, magyar, polski, português (Brasil), português (Portugal), română, svenska, русский, українська, हिन्दी, ไทย, 中文（中国）, 中文（台灣）, 日本語, 한국어

Website
extendlm.com
Support page
https://extendlm.com/support
See Chrome Web Store page ↗ View its code or download CRX ↗
Users over time As shown on the Chrome Web Store
40K50K60K70KTracking began 27 Sep 202627 Sep4 Oct11 Oct18 Oct25 Oct1 Nov8 Nov2026-09-27: 60,000 users2026-10-01: 70,000 users2026-10-06: 70,000 users2026-10-09: 70,000 users2026-10-10: 70,000 users2026-10-14: 70,000 users2026-10-18: 70,000 users2026-10-22: 60,000 users2026-10-28: 50,000 users2026-10-29: 50,000 users2026-10-31: 50,000 users2026-11-04: 40,000 users2026-11-06: 40,000 users2026-11-09: 40,000 users2026-11-09: new version2026-11-06: new version2026-11-04: new version2026-10-31: new version2026-10-28: new version2026-10-22: new version2026-10-18: new version2026-10-14: new version2026-10-10: new version2026-10-09: new version2026-10-06: new version2026-10-01: new version40,00040K50K60K70KTracking began27 Sep18 Oct8 Nov2026-09-27: 60,000 users2026-10-01: 70,000 users2026-10-06: 70,000 users2026-10-09: 70,000 users2026-10-10: 70,000 users2026-10-14: 70,000 users2026-10-18: 70,000 users2026-10-22: 60,000 users2026-10-28: 50,000 users2026-10-29: 50,000 users2026-10-31: 50,000 users2026-11-04: 40,000 users2026-11-06: 40,000 users2026-11-09: 40,000 users2026-11-09: new version2026-11-06: new version2026-11-04: new version2026-10-31: new version2026-10-28: new version2026-10-22: new version2026-10-18: new version2026-10-14: new version2026-10-10: new version2026-10-09: new version2026-10-06: new version2026-10-01: new version40K
Average rating
4.804.9027 Sep11 Oct25 Oct8 Nov4.914.804.9027 Sep18 Oct8 Nov4.91
Number of ratings
12513013527 Sep11 Oct25 Oct8 Nov13912513013527 Sep18 Oct8 Nov139
New version One point per check. Source: the extension's public Chrome Web Store listing.
Show the numbers
CheckedUsersRatingRatings
2026-11-0940,0004.91139
2026-11-0640,0004.89138
2026-11-0440,0004.89138
2026-10-3150,0004.89137
2026-10-2950,0004.89137
2026-10-2850,0004.89137
2026-10-2260,0004.89134
2026-10-1870,0004.89134
2026-10-1470,0004.91132
2026-10-1070,0004.79131
2026-10-0970,0004.79131
2026-10-0670,0004.79130
2026-10-0170,0004.78126
2026-09-2760,0004.78125
Users, 7 days
No change
since a week ago
Users, 30 days
−30,000
-42.9%
Rank
#2,796
by users, of 292,131 extensions
In its category
#587
of 115,641 in Tools

What changed

Every change found on a check, newest first

  1. New version 2.7.55, replacing 2.7.52.

  2. New version 2.7.52, replacing 2.7.25.

    Renamed from “NotebookLM Extension (Gemini Notebook) - ExtendLM” to “Gemini Notebook (NotebookLM) Extension - ExtendLM”.

  3. New version 2.7.25, replacing 2.6.95.

  4. New version 2.6.95, replacing 2.6.88.

  5. New version 2.6.88, replacing 2.6.68.

  6. New version 2.6.68, replacing 2.6.62.

  7. New version 2.6.62, replacing 2.6.44.

  8. New version 2.6.44, replacing 2.6.42.

  9. New version 2.6.42, replacing 2.6.23.

  10. New version 2.6.23, replacing 2.6.22.

  11. New version 2.6.22, replacing 2.5.95.

  12. New version 2.5.95, replacing 2.5.91.

Developer history

Moves to another publisher account and new contact emails, newest first

No move to another account and no new contact email since tracking began on 27 Sep 2026.

We know contact emails only by a keyed hash, so they're never shown. Recent account and contact changes →

What it can access

From the extension's manifest, in plain language

Sites
  • https://*.google.com/*google.com and its subdomains
  • https://*.googleusercontent.com/*googleusercontent.com and its subdomains
  • https://*.googlevideo.com/*googlevideo.com and its subdomains
  • https://*.usercontent.google.com/*usercontent.google.com and its subdomains
  • https://accounts.google.com/*accounts.google.com
  • https://api.extendlm.com/*api.extendlm.com
  • https://chat.openai.com/*chat.openai.com
  • https://chatgpt.com/*chatgpt.com
  • https://claude.ai/*claude.ai
  • https://dev.extendlm.com/*dev.extendlm.com
  • https://extendlm.com/*extendlm.com
  • https://gemini.google.com/*gemini.google.com
  • https://notebook.google.com/*notebook.google.com
  • https://notebooklm.google.com/*notebooklm.google.com
  • https://www.extendlm.com/*www.extendlm.com
  • https://www.google-analytics.com/*www.google-analytics.com
  • https://www.perplexity.ai/*www.perplexity.ai
Sites where it runs scripts
  • https://notebook.google.com/*notebook.google.com
  • https://notebooklm.google.com/*notebooklm.google.com
Browser features
  • activeTabThe tab you're on, only after you click the extension
  • backgroundKeep running in the background
  • contextMenusAdd items to the right-click menu
  • debuggerUse Chrome's debugger on your tabs, which gives full control of their pages
  • downloadsManage your downloads
  • offscreenOpen a hidden page for background work
  • scriptingRun scripts on sites it can reach
  • storageSave settings and data in your browser
  • tabCaptureCapture video and sound from tabs
  • tabsRead the addresses and titles of your tabs
  • unlimitedStorageStore more data than the usual limit
Asked for later, if you agree
  • http://*/*Every website
  • https://*/*Every website

About this data

Collected from the extension's public Chrome Web Store listing. It's checked every week, because it has 1,000 or more users, and again whenever a new version appears. Last checked 9 Nov 2026, 05:46 UTC; next check around 15 Nov 2026.

How we collect the data

Cite this page

Citation
Extension Tracker. “Gemini Notebook (NotebookLM) Extension - ExtendLM” (jefclkefiknlccjcjmkkhlcfkdgcmgcm). Chrome Web Store data, last checked 2026-11-09. https://extensiontracker.com/extension/jefclkefiknlccjcjmkkhlcfkdgcmgcm. Accessed 2026-11-13.
BibTeX
@misc{extensiontracker_jefclkefiknlccjcjmkkhlcfkdgcmgcm,
  title   = {Gemini Notebook (NotebookLM) Extension - ExtendLM (jefclkefiknlccjcjmkkhlcfkdgcmgcm)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-11-09},
  url     = {https://extensiontracker.com/extension/jefclkefiknlccjcjmkkhlcfkdgcmgcm},
  urldate = {2026-11-13}
}

The data is free to reuse under CC BY 4.0.

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