Extension Tracker

NotebookLM Extension (Gemini Notebook) - ExtendLM

60,000 users Rated 4.78 from 125 ratings Last updated 25 Sep 2026

By ExtendLM Live in the Chrome Web Store jefclkefiknlccjcjmkkhlcfkdgcmgcm Last checked 27 Sep 2026, 03:33 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
Trader status
Not declared a trader under EU law
Category
Productivity › Tools
First published
12 Dec 2025
Last updated
25 Sep 2026
Version
2.5.91
Size
8.87 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
Open in the Chrome Web Store ↗ Download the CRX from Google ↗
Users over time As shown on the Chrome Web Store

Tracking began on 27 Sep 2026. The chart appears after the second check.

Show the numbers
CheckedUsersRatingRatings
2026-09-2760,0004.78125
Users, 7 days
–
needs a week of history
Users, 30 days
–
needs a month of history
Rank
#2,241
by users, of 264,254 extensions
In its category
#461
of 103,321 in Tools

What changed

Every change found on a check, newest first

No changes found since tracking began on 27 Sep 2026.

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 27 Sep 2026, 03:33 UTC; next check around 2 Oct 2026.

How we collect the data

Cite this page

Citation
Extension Tracker. “NotebookLM Extension (Gemini Notebook) - ExtendLM” (jefclkefiknlccjcjmkkhlcfkdgcmgcm). Chrome Web Store data, last checked 2026-09-27. https://extensiontracker.com/extension/jefclkefiknlccjcjmkkhlcfkdgcmgcm. Accessed 2026-09-27.
BibTeX
@misc{extensiontracker_jefclkefiknlccjcjmkkhlcfkdgcmgcm,
  title   = {NotebookLM Extension (Gemini Notebook) - ExtendLM (jefclkefiknlccjcjmkkhlcfkdgcmgcm)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-09-27},
  url     = {https://extensiontracker.com/extension/jefclkefiknlccjcjmkkhlcfkdgcmgcm},
  urldate = {2026-09-27}
}

The data is free to reuse under CC BY 4.0.

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