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HeaderMaster Pro - HTTP Modifier: Headers, Redirects, and Payload injection

Chrome extension by ad · Productivity · Tools

A Chrome extension in Productivity · Tools with 27 users, barely installed.

Every site you visit. This extension can read and change the content of any page you open.

What the developer says, and 3 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
27
Rating
5.0 (1 ratings)
Users, last 17 days
+4
Rating, last 30 days
Not watched long enough to say
Version
2.0.1
Updated in the store
2026-07-16
Published
2026-07-16
Manifest
V3
Browser access
3 permissions, 1 site pattern

How it has moved

Users
+4 since 01.09
23-28 · 11 readings
  1. 2026-09-0123
  2. 2026-09-0227
  3. 2026-09-0426
  4. 2026-09-0628
  5. 2026-09-0727
  6. 2026-09-0828
  7. 2026-09-0927
  8. 2026-09-1325
  9. 2026-09-1526
  10. 2026-09-1627
  11. 2026-09-1727
Rating
unchanged since 01.09
reviewsrating 5.00 · 11 readings
  1. 2026-09-01reviews1rating5.00
  2. 2026-09-02reviews1rating5.00
  3. 2026-09-04reviews1rating5.00
  4. 2026-09-06reviews1rating5.00
  5. 2026-09-07reviews1rating5.00
  6. 2026-09-08reviews1rating5.00
  7. 2026-09-09reviews1rating5.00
  8. 2026-09-13reviews1rating5.00
  9. 2026-09-15reviews1rating5.00
  10. 2026-09-16reviews1rating5.00
  11. 2026-09-17reviews1rating5.00
Users
+4 since 01.09
23-28 · 11 readings
  1. 2026-09-0123
  2. 2026-09-0227
  3. 2026-09-0426
  4. 2026-09-0628
  5. 2026-09-0727
  6. 2026-09-0828
  7. 2026-09-0927
  8. 2026-09-1325
  9. 2026-09-1526
  10. 2026-09-1627
  11. 2026-09-1727
Rating
unchanged since 01.09
reviewsrating 5.00 · 11 readings
  1. 2026-09-01reviews1rating5.00
  2. 2026-09-02reviews1rating5.00
  3. 2026-09-04reviews1rating5.00
  4. 2026-09-06reviews1rating5.00
  5. 2026-09-07reviews1rating5.00
  6. 2026-09-08reviews1rating5.00
  7. 2026-09-09reviews1rating5.00
  8. 2026-09-13reviews1rating5.00
  9. 2026-09-15reviews1rating5.00
  10. 2026-09-16reviews1rating5.00
  11. 2026-09-17reviews1rating5.00

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Every site you visit. This extension can read and change the content of any page you open.

  • Block or redirect requests by rules it declares in advance declarativeNetRequest
  • Block or redirect requests on the sites it can access declarativeNetRequestWithHostAccess
  • Store data in your browser storage

The full permission history for this extension

What changed recently

Nothing has moved on this listing since we started watching it.

The publisher

ad publishes 7 listings we track, 301k users between them.

  1. Story Saver ad · Lifestyle · Social · published 2019-08-12 200k users ★ 4.6
  2. Notepad - online ad · Productivity · Workflow · published 2017-02-09 100k users ★ 4.1
  3. Insta Pro for Chrome – Instagram Toolkit ad · Productivity · Tools · published 2025-04-22 789 users ★ 3.0
Show 3 more from this publisher
  1. TikTok Browser Downloader ad · Lifestyle · Social · published 2026-06-30 147 users ★ 5.0
  2. ZeWork Chat ad · Productivity · Developer · published 2026-07-13 9 users
  3. ZeWork for Education ad · Productivity · Education · published 2026-07-19 3 users (last published figure)

Like this one

Listings the catalog judges closest in what they say they do.

  1. Lazy Header Editor - Modify HTTP Headers Describes nearly the same job, smaller audience 110 users
  2. ModHeader V1 Describes nearly the same job, smaller audience 2k users ★ 4.0
  3. SetHeader Describes nearly the same job, smaller audience 10 users ★ 5.0
  4. Header Handler Describes nearly the same job, smaller audience 33 users ★ 5.0
  5. DevHeader - Header Injector & HTTP Header Editor Describes nearly the same job, smaller audience 67 users ★ 5.0

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

Is this your extension?

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

See what the panel does

Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.