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Privacy Policy — Simple HTTP Header

Last updated: 2026-07-06

Simple HTTP Header is a browser extension that modifies HTTP request and response headers using Chrome's declarative declarativeNetRequest API.

What we collect

Nothing. The extension collects no personal data and transmits no data to anyone.

  • We do not collect, store, or transmit any personal or usage information.
  • We do not use analytics, tracking, telemetry, or advertising.
  • We make no network requests of our own.

What the extension can and cannot access

Because it is declarative, the extension registers header rules that the browser applies itself. It cannot read, log, or stream the contents of your web requests or responses, your cookies, or your browsing history.

Where your data lives

The rules and profiles you create — including any header values you type, which may contain tokens or secrets — are stored only on your own device using chrome.storage.local. This data:

  • never leaves your machine,
  • is never synced to your Google account (we deliberately do not use chrome.storage.sync),
  • is removed when you uninstall the extension.

Exporting a profile writes JSON to your clipboard only when you explicitly click "Copy". Nothing is shared automatically.

Permissions and why they are needed

  • declarativeNetRequest — to register the header-modification rules.
  • storage — to save your rules and profiles locally on your device.
  • host_permissions: <all_urls> — Chrome requires host access for modifyHeaders to apply to the sites you target. With declarativeNetRequest this grants the extension the ability to modify headers only; it does not grant the ability to read page content or traffic.

Contact

Questions or concerns: open an issue at https://github.com/agkloop/simple-http-header/issues.