You can find out about it, like I did, i.e. doing a Search. I got a bunch of hits, all pointing to a Russian version of Firefox. If you can read Russian, you can enjoy yourself, getting more info.
UserAgent: Mozilla/5.0 (Windows NT 5.1; rv:13.0) Gecko/20120615 Firefox/13.0.1 SeaMonkey/2.10.1
A minority may be right, and a majority is always wrong
~ Henrik Ibsen
WinXP, SP3, 512 MB, SM2.17.1, FF21, TB17.O.5, IE8.0, Google Chrome 26, Ghostwall , Kingsoft5.6, JRE1.7_21.