A simple user-agent browser sniffer written in Adobe ColdFusion. <1ms execution time on CF16.
Will require updates to stay current with User-Agent strings. Obviously not definitive (clients can lie), but a good enough approach for applications that you're unlikely to be a victim of deception (or it doesn't matter). A more definitive approach would be detecting the browser rendering engine. I'd suggest that as your next step if you need a little more confidence.
A good reference is the Mozilla User-Agent documentation:
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent
https://developer.mozilla.org/en-US/docs/Web/HTTP/Browser_detection_using_the_user_agent
There is one method, getBrowserDetails() which returns a struct containing the browser name and version.
This was developed as a simpler replacement for BrowsCapCFC because of slow performance.