Extension Tracker

Modify HTTP Headers (HTTP Header) - FlexHeader

7,000 users Rated 4.87 from 31 ratings Last updated 11 Sep 2026

By Harrison Deo Live in the Chrome Web Store gffpeamhhldhibdngenbfciboinanppf Search Google ↗ Last checked 8 Nov 2026, 13:36 UTC

The listing

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

Add, modify & delete HTTP request/response headers with URL & regex rules. Open-source, private, no data collectionSummary from the listing
Developer
Harrison Deo
Enhanced Safe Browsing
Trusted. What this means →
Category
Productivity › Developer Tools
First published
19 Aug 2023
Last updated
11 Sep 2026
Version
1.11.2
Size
188 KiB
Minimum Chrome
88
Languages
1 language

English (United Kingdom)

Website
harrisondeo.me.uk
Support page
https://github.com/harrisondeo/FlexHeader
See Chrome Web Store page ↗ View its code or download CRX ↗
Users over time As shown on the Chrome Web Store
7K7.5K8KTracking began 27 Sep 202627 Sep4 Oct11 Oct18 Oct25 Oct1 Nov8 Nov2026-09-27: 7,000 users2026-09-29: 7,000 users2026-10-05: 7,000 users2026-10-13: 7,000 users2026-10-19: 8,000 users2026-10-26: 7,000 users2026-11-01: 7,000 users2026-11-08: 7,000 users7,0007K7.5K8KTracking began27 Sep18 Oct8 Nov2026-09-27: 7,000 users2026-09-29: 7,000 users2026-10-05: 7,000 users2026-10-13: 7,000 users2026-10-19: 8,000 users2026-10-26: 7,000 users2026-11-01: 7,000 users2026-11-08: 7,000 users7K
Average rating
4.804.9027 Sep11 Oct25 Oct8 Nov4.874.804.9027 Sep18 Oct8 Nov4.87
Number of ratings
29303127 Sep11 Oct25 Oct8 Nov3129303127 Sep18 Oct8 Nov31
New version One point per check. Source: the extension's public Chrome Web Store listing.
Show the numbers
CheckedUsersRatingRatings
2026-11-087,0004.8731
2026-11-017,0004.8731
2026-10-267,0004.8731
2026-10-198,0004.8731
2026-10-137,0004.8730
2026-10-057,0004.8730
2026-09-297,0004.8629
2026-09-277,0004.8629
Users, 7 days
No change
since a week ago
Users, 30 days
No change
+0.0%
Rank
#8,681
by users, of 292,131 extensions
In its category
#798
of 30,442 in Developer Tools

What changed

Every change found on a check, newest first

No changes found since tracking began on 27 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 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

Every websiteIt can read and change your data on all the sites you visit.
Sites
  • <all_urls>Every website
Browser features
  • declarativeNetRequestBlock or change network requests, using rules
  • storageSave settings and data in your browser

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 8 Nov 2026, 13:36 UTC; next check around 15 Nov 2026.

How we collect the data

Cite this page

Citation
Extension Tracker. “Modify HTTP Headers (HTTP Header) - FlexHeader” (gffpeamhhldhibdngenbfciboinanppf). Chrome Web Store data, last checked 2026-11-08. https://extensiontracker.com/extension/gffpeamhhldhibdngenbfciboinanppf. Accessed 2026-11-13.
BibTeX
@misc{extensiontracker_gffpeamhhldhibdngenbfciboinanppf,
  title   = {Modify HTTP Headers (HTTP Header) - FlexHeader (gffpeamhhldhibdngenbfciboinanppf)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-11-08},
  url     = {https://extensiontracker.com/extension/gffpeamhhldhibdngenbfciboinanppf},
  urldate = {2026-11-13}
}

The data is free to reuse under CC BY 4.0.

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