mozilla/MozStumbler — pull request #969 by garvankeeley (2014-10-09 15:57:54+00:00)
Title: add build and os info to user agent

Looks like this:
google/hammerhead/hammerhead:4.4.4/KTU84P/1227136:user/release-keys__MozStumbler/0.40.0.0