Update: 4th July 2013: This is now being maintained by Cheesy. Read about it here.
I have deprecated the WebDriver User Agent gem.
There are two main reasons for this:
a) I believe in responsive web apps so user agent spoofing is not something I recommend.
b) I am tired of demands placed upon me to resolve people’s issues with the gem when it is so simple to either send a pull request – or roll your own.
I recommend you roll your own user agent spoofing if you really need it.