List of Firefox 21 Browsers

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Agent	First Seen (AEST)	Last Seen (AEST)
Firefox 21 Linux Ubuntu [207550]	2014-02-15 19:56:16	2026-09-15 05:47:01
Firefox 21 Mac OS X [195868]	2013-05-18 19:30:35	2026-06-30 21:17:05
Firefox 21 Windows 7 [199322]	2013-08-26 20:59:08	2026-06-16 07:12:05
Firefox 21 Linux (other) [195971]	2013-05-21 02:29:36	2026-03-18 21:47:49
Firefox 21 Windows 8 [236907]	2015-12-23 17:45:47	2026-03-08 15:36:38
Firefox 21 Windows 7 [204841]	2013-12-13 17:08:04	2026-01-06 10:51:33
Firefox 21 Windows 7 [194608]	2013-04-14 15:03:07	2025-11-14 02:01:18
Firefox 21 Windows XP [210522]	2014-04-18 01:00:37	2025-10-17 23:15:11
Firefox 21 Windows 7 [194381]	2013-04-09 08:20:10	2025-10-10 11:31:42
Firefox 21 Windows 8 [219559]	2014-12-08 19:09:18	2025-09-25 06:17:17
Firefox 21 Windows XP [194228]	2013-04-05 18:51:01	2025-08-23 23:11:11
Firefox 21 Linux Ubuntu [195759]	2013-05-15 10:56:36	2025-08-06 18:52:40
Firefox 21 Windows 8 [210749]	2014-04-23 15:54:49	2025-04-17 06:53:03
Firefox 21 Windows XP [208378]	2014-03-06 08:07:45	2025-03-07 06:29:35
Firefox 21 Windows 8 [194537]	2013-04-12 12:04:37	2024-10-13 06:00:09
Firefox 21 Windows 2000 [201819]	2013-10-23 12:10:11	2023-09-25 15:32:41
Firefox 21 Windows 10 [274824]	2019-09-05 10:59:05	2022-09-28 09:43:38