Wappalyzer Firefox Extension: Install, Features, and Alternatives

Troubleshooting Wappalyzer in Firefox: Fix Common Issues

If Wappalyzer isn’t working properly in Firefox, follow this step-by-step guide to diagnose and fix the most common problems.

1. Confirm extension is installed and enabled

1. Click the menu (three bars) → Add-ons and themes → Extensions.
2. Ensure Wappalyzer is listed and the toggle is On.
3. If missing, install from the Firefox Add-ons site: https://addons.mozilla.org.

2. Update Firefox and Wappalyzer

1. Firefox: Menu → Help → About Firefox — install updates and restart.
2. Wappalyzer: Add-ons and themes → Extensions → click the gear → Check for Updates.

3. Check extension permissions and site access

1. Extensions → Wappalyzer → Preferences (three-dot menu) → Manage Extension or Site access.
2. Ensure access is allowed for the site you’re testing (choose “On all sites” or “When you click the extension” as needed).
3. If set to “Only on some sites,” add the site manually.

4. Disable conflicting extensions

1. Some privacy or script-blocking add-ons (uBlock Origin, NoScript, Privacy Badger, HTTPS Everywhere forks) can break detection.
2. Temporarily disable these extensions and reload the page to test Wappalyzer.
3. If Wappalyzer works after disabling one, re-enable others and keep the conflicting one disabled or change its settings.

5. Clear cache and reload

1. Press Ctrl+Shift+R (Windows/Linux) or Cmd+Shift+R (macOS) to hard reload.
2. Optionally clear site data: Lock icon → Clear cookies and site data → Reload.

6. Check private browsing / container tabs

1. Extensions may be disabled in private windows. Open a normal window or enable Wappalyzer for private browsing: Add-ons → Wappalyzer → Run in Private Windows.
2. Container tabs can isolate site data; try a non-container tab.

7. Verify network and CSP issues

1. Content Security Policy (CSP) or strict network settings can block the extension’s detection scripts.
2. Open DevTools (F12) → Console — look for blocked script errors or CSP warnings related to Wappalyzer.
3. If CSP blocks detection, use the extension’s icon to view built-in detections or test on another site.

8. Reinstall Wappalyzer

1. Remove: Extensions → Wappalyzer → Remove.
2. Restart Firefox.
3. Reinstall from the Firefox Add-ons site and test again.

9. Test in a fresh profile

1. Create a new Firefox profile to rule out profile corruption: about:profiles → Create a New Profile → Launch profile.
2. Install Wappalyzer and test — if it works, migrate bookmarks/settings selectively.

10. Review logs and report a bug

1. Open Browser Console (Ctrl+Shift+J / Cmd+Shift+J) while loading a page to capture errors from the extension.
2. Collect extension version, Firefox version, and a screenshot or console log.
3. Report at Wappalyzer’s support channel or the extension page on Mozilla Add-ons with the collected info.

Quick checklist

• Extension installed and enabled
• Firefox and extension updated
• Site access permissions correct
• Conflicting extensions disabled
• Not in private window (or allow private mode)
• Hard reload and clear site data
• Reinstall or test in new profile
• Capture logs and report if needed

If you want, I can generate the exact bug-report text (including required version info and steps to reproduce) you can paste into Wappalyzer’s support page.