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Preview of Library Sniffer

Library Sniffer by xiaofeng

Sniff website frameworks, libraries, servers, and optional remote technology API results.

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Extension Metadata

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About this extension
Manifest V3 service worker architecture.
Local detection for common CMS, JavaScript libraries, web frameworks, analytics tools, APIs, and web servers.
Normalized remote technology categories for JavaScript frameworks, CDN, security, payment processors, font scripts, JavaScript libraries, web frameworks, UI frameworks, and programming languages.
Optional free API lookup providers:
TechnologyChecker Free plan: GET https://api.technologychecker.io/v1/domain/DOMAIN
BuiltWith Free API: GET https://api.builtwith.com/free1/api.json?KEY=API_KEY&LOOKUP=DOMAIN
Refreshed options page and new release icons.
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Permissions and data

Required permissions:

  • Access browser tabs
  • Access your data for all websites

Optional permissions:

  • Access your data for all websites

Required data collection, according to the developer:

  • Browsing activity
Learn more
More information
Add-on Links
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Version
2.9.1
Size
536.13 KB
Last updated
3 days ago (Jun 30, 2026)
Related Categories
  • Web Development
License
GNU General Public License v3.0 only
Version History
  • See all versions
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