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Headers Panel

Real navigation response headers, CSP and security score.

chromeedgebraveoperafirefox🔒 Zero telemetryVersion 1.0.0
Download the extension for ChromeDownload the extension for Firefox

Description

Shows the real response headers of the document loaded in the tab (observed with your session), with a security score rating HSTS, Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, Referrer-Policy and Permissions-Policy, plus cache and CDN headers (e.g. CF-Cache-Status, Age). Read-only observation via webRequest, no traffic blocking, no data leaves the browser.

Features

  • Real response headers of the tab's main document
  • Security score on HSTS, CSP, X-Content-Type-Options, X-Frame-Options, Referrer-Policy, Permissions-Policy
  • Cache and CDN headers (CF-Cache-Status, Age, etc.)
  • Read-only observation via webRequest (no blocking)
  • 100% offline, zero telemetry

Privacy

100% local processing in your browser. Zero telemetry: no data is sent to external servers.

Required permissions

  • webRequest
  • activeTab
  • storage

Screenshots

Headers Panel

Supported browsers

chromeedgebraveoperafirefox