Comment 6 for bug 1233270

The following User-Agent string override gets us the desired result:

    "twitter.com": ["Mobile", "Android 4; Mobile"],

However, this means we’re also getting popups in-app suggesting installing the native android application :/
See attached screenshot.
In the end, it’s a trade-off between usability and communication. And of course, we should get in touch with the guys at twitter to do some evangelism and convince them that our default UA string is a good candidate for modern, touch-enabled content.