Update TBB User Agent String for detecting Orfox
A few years ago, Check began detecting Orfox via its User Agent String with [0] and then [1]. As it turns out, now we want the logic in [0] again.
[0] https://gitweb.torproject.org/check.git/commit/?id=749fd988c32e764e7fc8dde1f59ab7f06a63f0cd [1] https://gitweb.torproject.org/check.git/commit/?id=644e1c21b682a911acbea567f55d156a084a8c5f