Mozilla/5.0 (compatible; Firefox Addon; Windows XP 5.1)
174.142.75.nnn
ip-174-142-75-nnn.static.privatedns.com
-----
OrgName: iWeb Technologies Inc.
OrgID: GIT-20
City: Montreal
NetRange: 174.142.0.0 - 174.142.255.255
-----
ROBOTS.TXT? No
I'm fairly certain this is a bot of some kind since it took only default root pages.