Extension Tracker

HTTP Header Spy

9,000 users Rated 3.84 from 61 ratings Last updated 5 Sep 2026

By Michiel Roos Live in the Chrome Web Store agnoocojkneiphkobpcfoaenhpjnmifb Search Google ↗ Last checked 7 Nov 2026, 18:56 UTC

The listing

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

HTTP Header Spy enables you to inspect request- response headers and cookies right after page load with no extra clicks.Summary from the listing
Developer
Michiel Roos
Enhanced Safe Browsing
Trusted. What this means →
Category
Productivity › Developer Tools
First published
17 Jun 2013
Last updated
5 Sep 2026
Version
3.0.0
Size
293 KiB
Minimum Chrome
88
Languages
6 languages

English, Nederlands, español, русский, हिन्दी, 中文（中国）

Website
michielroos.com
See Chrome Web Store page ↗ View its code or download CRX ↗
Users over time As shown on the Chrome Web Store
9KTracking began 26 Sep 202626 Sep3 Oct10 Oct17 Oct24 Oct31 Oct7 Nov2026-09-26: 9,000 users2026-10-03: 9,000 users2026-10-09: 9,000 users2026-10-16: 9,000 users2026-10-23: 9,000 users2026-10-31: 9,000 users2026-11-07: 9,000 users9,0009KTracking began26 Sep17 Oct7 Nov2026-09-26: 9,000 users2026-10-03: 9,000 users2026-10-09: 9,000 users2026-10-16: 9,000 users2026-10-23: 9,000 users2026-10-31: 9,000 users2026-11-07: 9,000 users9K
Average rating
3.803.9026 Sep10 Oct24 Oct7 Nov3.843.803.9026 Sep17 Oct7 Nov3.84
Number of ratings
60616226 Sep10 Oct24 Oct7 Nov6160616226 Sep17 Oct7 Nov61
New version One point per check. Source: the extension's public Chrome Web Store listing.
Show the numbers
CheckedUsersRatingRatings
2026-11-079,0003.8461
2026-10-319,0003.8461
2026-10-239,0003.8461
2026-10-169,0003.8461
2026-10-099,0003.8461
2026-10-039,0003.8461
2026-09-269,0003.8461
Users, 7 days
No change
since a week ago
Users, 30 days
No change
+0.0%
Rank
#7,707
by users, of 292,131 extensions
In its category
#707
of 30,442 in Developer Tools

What changed

Every change found on a check, newest first

No changes found since tracking began on 26 Sep 2026.

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 26 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

Every websiteIt can read and change your data on all the sites you visit.
Sites
  • http://*/*Every website
  • https://*/*Every website
Sites where it runs scripts
  • http://*/*Every website
  • https://*/*Every website
Browser features
  • activeTabThe tab you're on, only after you click the extension
  • scriptingRun scripts on sites it can reach
  • storageSave settings and data in your browser
  • tabsRead the addresses and titles of your tabs
  • webRequestWatch network requests on the sites it can reach

More from this developer

Other extensions from the same publisher account

ExtensionUsersRatingRatingsCategory
Xposer25 –– Developer Tools
All 2 extensions by Michiel Roos →

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 7 Nov 2026, 18:56 UTC; next check around 14 Nov 2026.

How we collect the data

Cite this page

Citation
Extension Tracker. “HTTP Header Spy” (agnoocojkneiphkobpcfoaenhpjnmifb). Chrome Web Store data, last checked 2026-11-07. https://extensiontracker.com/extension/agnoocojkneiphkobpcfoaenhpjnmifb. Accessed 2026-11-13.
BibTeX
@misc{extensiontracker_agnoocojkneiphkobpcfoaenhpjnmifb,
  title   = {HTTP Header Spy (agnoocojkneiphkobpcfoaenhpjnmifb)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-11-07},
  url     = {https://extensiontracker.com/extension/agnoocojkneiphkobpcfoaenhpjnmifb},
  urldate = {2026-11-13}
}

The data is free to reuse under CC BY 4.0.

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