headerMod — Modify HTTP Headers
by mubai19951001 more by this developer →
#119,155 of 271,662 by installs on Chrome · #71,705 of 164,331 in productivity
First seen by this census 09/01/2026 — the store does not publish a creation date
Last updated 08/26/2026
Tracked since 09/01/2026
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Category: productivity / developer
Languages: English (United States)
Description
Add or modify HTTP request headers for development and testing. Local-only, no tracking.
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Growth
Change in installs. This store publishes the count rounded to one or two significant figures, so it does not move when the listing grows - it moves when the rounding rolls over. The figures below are therefore what was actually observed between the two crawls named in "measured over", not scaled to the window, and the percentage is of that same rounding step - so a small listing crossing a bucket shows a very large one. A window needs a full period of history before it reports anything.
| Per | Growth | Growth % | Actual change | Measured over |
|---|---|---|---|---|
| day | -1 | — | -1 | 1.6 days |
| week | -2 | — | -2 | 8.7 days |
| month | Not enough history yet | |||
| year | Not enough history yet | |||
History
Users
Permissions
Access level: Limited — Some access to your activity or data, or to specific websites.
- Block or modify web requests, with access to the content of matched sites
- If you allow it: reads and changes your data on all websites
Manifest V3
No website access
Can ask you for access to all websites
- activeTab — See the page you're currently viewing, only when you click the extension
- declarativeNetRequestWithHostAccess — Block or modify web requests, with access to the content of matched sites
- storage — Save its own settings and data locally