Redirect Inspector door 301.st

Redirect Inspector reveals what happens between the URL you open and the final landing page. It captures HTTP 3xx redirects, HSTS upgrades, and client-side redirects (JavaScript, meta refresh) and shows a readable hop-by-hop chain in a side panel.

Then you can add остальное (можно продолжать сколько угодно):

Real-time redirect log with live capturing state

Hop details: status code, method, timing (when available)

Smart noise filtering (pixels/analytics/media requests)

Copy any chain to clipboard as formatted text

Per-tab badge counter, one-click “Clear log”

Dark/Light theme (follows system preference)

Local-only storage — data never leaves your browser (logs capped)

Privacy
All processing happens locally. The add-on makes zero network requests of its own. No analytics, no telemetry, no external services.

Source code: https://github.com/investblog/redirect-inspector