Get alerted when your site breaks on non-mainstream browsers
Automated checks using Pale Moon, legacy browsers, and edge-case user agents. Know instantly when Cloudflare or your stack starts blocking real users.
Start Monitoring — $19/moNo credit card required to start. Cancel anytime.
Pale Moon & Legacy UAs
Tests with real user-agent strings from Pale Moon, Waterfox, older Chrome/Firefox.
Block Detection
Detects Cloudflare challenges, 403s, and JS errors that only affect minority browsers.
Instant Alerts
Email and webhook notifications the moment a regression or block is detected.
Simple Pricing
Pro Plan
$19
/month
- ✓ Up to 10 monitored URLs
- ✓ Checks every 6 hours
- ✓ 10+ browser user agents
- ✓ Email + webhook alerts
- ✓ Block & error detection
- ✓ Dashboard with history
FAQ
Which browsers does it test with?
We simulate Pale Moon 33, Waterfox Classic, Firefox ESR 78, Chrome 80, and several other legacy user agents that are commonly blocked by WAFs and CDNs.
How does block detection work?
Each check looks for Cloudflare challenge pages, HTTP 403/429 responses, CAPTCHA triggers, and JavaScript errors that only appear for specific user agents.
Can I add my own custom user agents?
Yes. The Pro plan lets you define custom user-agent strings so you can test any browser fingerprint that matters to your audience.