Firefox version history

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Market share overview According to StatCounter data January 2025[1] This box: view talk edit

Browser % of Fx % of total Firefox 1 — — Firefox 2 — — Firefox 3 — — Firefox 4 — — Firefox 5–9 — — Firefox 10–16 0.79% 0.02% Firefox 17–23 — — Firefox 24–30 — — Firefox 31–37 — — Firefox 38–44 — — Firefox 45–51 — — Firefox 52–59 1.58% 0.04% Firefox 60–67 — — Firefox 68–77 — — Firefox 78–90 0.39% 0.01% Firefox 91–101 — — Firefox 102–114 — — Firefox 115 and 115 ESR 9.45% 0.24% Firefox 116 — — Firefox 117 — — Firefox 118 3.54% 0.09% Firefox 119 — — Firefox 120 — — Firefox 121 — — Firefox 122 — — Firefox 123 — — Firefox 124 — — Firefox 125 0.39% 0.01% Firefox 126 — — Firefox 127 — — Firefox 128 and 128 ESR 3.54% 0.09% Firefox 129 — — Firefox 130 — — Firefox 131 0.39% 0.01% Firefox 132 0.79% 0.02% Firefox 133 23.62% 0.60% Firefox 134 46.85% 1.19% Firefox 135 — — All variants[2] 100% 2.54%

Firefox was created by Dave Hyatt and Blake Ross as an experimental branch of the Mozilla browser, first released as Firefox 1.0 on November 9, 2004. Starting with version 5.0, a rapid release cycle was put into effect, resulting in a new major version release every six weeks. This was gradually accelerated further in late 2019, so that new major releases occur on four-week cycles starting in 2020.^[3]