Latest Firefox Mobile 51 user agents:

User Agent Platform Device
Mozilla/5.0 (Mobile; OPENC; rv:51.0) Gecko/51.0 Firefox/51.0 Firefox OS Unknown
Mozilla/5.0 (Android; Tablet; rv:51.0) Gecko/51.0 Firefox/51.0 Android Unknown
Mozilla/5.0 (Android; Mobile; rv:51.0) Gecko/51.0 Firefox/51.0 Android Unknown
Mozilla/5.0 (Android 9; Mobile; rv:51.0) Gecko/51.0 Firefox/51.0 Android 9 Unknown
Mozilla/5.0 (Android 8.1.0; Tablet; rv:51.0) Gecko/51.0 Firefox/51.0 Android 8 Unknown
Mozilla/5.0 (Android 8.1.0; Mobile; rv:51.0) Gecko/51.0 Firefox/51.0 Android 8 Unknown
Mozilla/5.0 (Android 8.0.0; Mobile; rv:51.0) Gecko/51.0 Firefox/51.0 Android 8 Unknown
Mozilla/5.0 (Android 7.1.1; Tablet; rv:51.0) Gecko/51.0 Firefox/51.0 Android 7 Unknown
Mozilla/5.0 (Android 7.1.1; Mobile; rv:51.0) Gecko/51.0 Firefox/51.0 Android 7 Unknown
Mozilla/5.0 (Android 7.0; Tablet; rv:51.0.3) Gecko/51.0.3 Firefox/51.0.3 Android 7 Unknown
Mozilla/5.0 (Android 7.0; Tablet; rv:51.0) Gecko/51.0 Firefox/51.0 Android 7 Unknown
Mozilla/5.0 (Android 7.0; Tablet; rv:51.0) Gecko/20100101 Firefox/51.0 Android 7 Unknown
Mozilla/5.0 (Android 7.0; Mobile; rv:53.0) Gecko/51.0 Firefox/51.0 Android 7 Unknown
Mozilla/5.0 (Android 7.0; Mobile; rv:51.0.3) Gecko/51.0.3 Firefox/51.0.3 Android 7 Unknown
Mozilla/5.0 (Android 7.0; Mobile; rv:51.0) Gecko/20100101 Firefox/51.0 Android 7 Unknown
Mozilla/5.0 (Android 7.0; Mobile; LG-H871; rv:51.0) Gecko/51.0 Firefox/51.0 Android 7 G6
Mozilla/5.0 (Android 6.0; Tablet; rv:51.0) Gecko/51.0 Firefox/51.0 Android 6 Unknown
Mozilla/5.0 (Android 6.0; Tablet; rv:51.0) Gecko/20100101 Firefox/51.0 Android 6 Unknown
Mozilla/5.0 (Android 6.0.1; Tablet; rv:51.0) Gecko/51.0 Firefox/51.0 Android 6 Unknown
Mozilla/5.0 (Android 6.0.1; Mobile; rv:51.0) Gecko/51.0 Firefox/51.0 Android 6 Unknown