| User agent | Platforms | Hardware |
|---|---|---|
| Mozilla/5.0 (Android; Mobile; rv:21.0) Gecko/21.0 Firefox/21.0 | Android | smartphone |
| Mozilla/5.0 (Linux; ARMv7; Android 4.1.1; fr-fr; SonyEricsson Xperia E; rv 21.0) Gecko/20130514 Mobile Firefox/21.0 | Android 4 | Xperia |
| Mozilla/5.0 (Linux; Android 4.1.1; fr-fr; SonyEricsson; C1505 Build/11.3.A.0.56; rv 21.0) Gecko/20130514 Mobile Firefox/21.0 | Android 4 | Xperia E |