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PostHog Debugger helps inspect PostHog events, requests, feature flags, session details, and browser constraints from DevTools.

Install for Chrome

1. Install PostHog Debugger from the Chrome Web Store.
2. Open the site you want to debug.
3. Open Chrome DevTools and select the PostHog panel.
4. Reload so the panel can capture events fired during page load.

Install from Firefox Add-ons

1. Install PostHog Debugger from Firefox Add-ons.
2. Open the site you want to debug.
3. Open Firefox DevTools and select the PostHog panel.
4. Reload so the panel can capture page-load events.

No Events Appear Until the Page Reloads

The extension captures requests after its page hook is installed. If DevTools opened after the page loaded, reload with DevTools still open. Check that recording is not paused and filters are not hiding expected events.

Continue with the PostHog events not showing checklist for a complete browser-side and project-side diagnosis.

Requests Are Blocked by an Ad Blocker

Ad blockers, privacy tools, browser shields, and corporate filters can block PostHog ingestion. The Network view should show blocked or failed PostHog-shaped requests. Use the panel reference to inspect the available evidence.

Self-Hosted or Reverse-Proxied Endpoints

The extension detects endpoint shapes including /i/v0/e/, /e/, /batch/, /capture/, /decide, /flags, and /s/.

Review detection limits before treating an unclassified custom path as a failed request.

Iframe Limitations

The extension captures PostHog traffic from frames where the browser permits its content script. Protected pages, extension pages, and restricted schemes can block injection.

Contact

For support, email gevorg@glechyan.com.

Include the extension version, browser version, expected PostHog endpoint shape, and whether the issue remains after reloading with DevTools open.

Read the privacy policy before sharing a capture. You can also open a sanitized GitHub issue, return to the product overview, or review the complete changelog.