Latest Firefox Mobile 31 user agents:

User Agent Platform Device
Mozilla/5.0 (Maemo; Linux; U; Jolla; Sailfish; Mobile; rv:31.0) Gecko/31.0 Firefox/31.0 Sailfish OS Unknown
Mozilla/5.0 (Android; Tablet; rv:31.0) Gecko/31.0 Firefox/31.0 Android Unknown
Mozilla/5.0 (Android; Mobile; rv:31.0) Gecko/31.0 Firefox/31.0 Android Unknown
Mozilla/5.0 (Android 9; Mobile; rv:31.0) Gecko/31.0 Firefox/31.0 Android 9 Unknown
Mozilla/5.0 (Android 6.0.1; Mobile; rv:31.0) Gecko/31.0 Firefox/31.0 Android 6 Unknown
Mozilla/5.0 (Android 5.0.2; Mobile; rv:31.0) Gecko/31.0 Firefox/31.0 Android 5 Unknown
Mozilla/5.0 (Android 5.0.1; Mobile; rv:31.0) Gecko/31.0 Firefox/31.0 Android 5 Unknown
Mozilla/5.0 (Android 4.4.2; Mobile; rv:31.0) Gecko/31.0 Firefox/31.0 Android 4 Unknown
Mozilla/5.0 (Android 4.3.1; Mobile; rv:31.0) Gecko/31.0 Firefox/31.0 Android 4 Unknown
Mozilla/5.0 (Android 4.1.2; Mobile; rv:31.0) Gecko/31.0 Firefox/31.0 Android 4 Unknown
Mozilla/5.0 (Android 4.0.2; Mobile; rv:31.0) Gecko/31.0 Firefox/31.0 Android 4 Unknown
Mozilla/5.0 (Android 2.3.4; Mobile; rv:31.0) Gecko/31.0 Firefox/31.0 Android 2 Unknown
Mozilla/5.0 (Android 2.3.1; Mobile; rv:31.0) Gecko/31.0 Firefox/31.0 Android 2 Unknown