- phase one does it match 'trident|webkit|gecko|chrome|safari|msie|opera'
yes- well it is possibly a browser
- phase two does it match 'rss|bot|spider|crawler|facebook|archive|wayback|ping|monitor'
probably a crawler then
Based off: https://gist.github.com/SamSaffron/6cfad7ea3e6df321ffb7a84f93720a53
You can use the crawler user agents site setting to amend what user agents
are considered crawlers based on a string match in the user agent
Also improves performance of crawler detection slightly