Http user-agents starting with 'F'
f
facebookexternalhit/1.1
facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php)
facebookexternalhit/1.1 (compatible;)
facebookexternalhit/1.1;line-poker/1.0
Faraday v0.13.1
FAST-WebCrawler/3.8 (crawler at trd dot overture dot com; http://www.alltheweb.com/help/webmaster/crawler)
fasthttp
Fastream NETFile Server
FeedBurner/1.0
FeedBurner/1.0 (http://www.FeedBurner.com)
FeedFetcher-Google; ( http://www.google.com/feedfetcher.html)
Feedly/1.0 (+http://www.feedly.com/fetcher.html; like FeedFetcher-Google)
FeedlyApp/1.0 (http://www.feedly.com)
feedparser/6.0.10 +https://github.com/kurtmckee/feedparser/
Feedshow/x.0 (http://www.feedshow.com; 1 subscriber)
FeedshowOnline (http://www.feedshow.com)
fidget-spinner-bot
Firefox 1.1.16
Firefox 13.0.1
Firefox 2.0.0.14
Firefox 3.0.11
Firefox 3.0.19
Firefox 3.0.3
Firefox 3.6.3
Firefox 3.6.8
Firefox 4.0b10
firefox/5.0 (Linux; Android 5.1.1; SM-J111F) AppleWebKit/36 (KHTML, like Gecko) Chrome/71.0.36
Flock 0.7.6
Flock 1.2.4
Flock 2.0a1pre
Foregenix Web Scan 1.100000 (www.foregenix.com/scan)
ft
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