all url's list (homepage)
plain text detection (internal) window object fingerprint detection js anomalies
the truth extractor
links broken?
Other Browser Detection sites:
WhatIsMyBrowser.com
Device Info
gs.statcounter.com/detect
BrowserScan
Version Checker
BrowserDetector
BrowserLeaks.com
Detect my Browser
Skyward (quick access)
browser-check
Scratch "OS Detector (Updated 2024)"
untested:
What's mu user agent?
How Do They Compare?
Browser Detection Site Comparison 
ver:3