mac_processor() - a mac processor
linux_processor() - a linux processor
user_agent() - a user agent string, randomly picks one
from chrome, firefix, safari, opera or internet explorer
chrome(version_from, version_to, build_from, build_to) - a chrome
user agent string
firefox() - a firefox user agent string
safari() - a safari user agent string
opera() - an opera user agent string
internet_explorer() - an internet explorer user agent string
windows_platform_token() - a windows platform token
linux_platform_token() - a linux platform token
mac_platform_token() - a mac platform token