| Gecko version |
Applications based on it |
| Gecko 55 |
Firefox 55, SeaMonkey 2.52 |
| Gecko 52 |
Firefox 52, SeaMonkey 2.49 |
| Gecko 49 |
Firefox 49, SeaMonkey 2.46 |
| Gecko 43 |
Firefox 43, SeaMonkey 2.40 |
| Gecko 42 |
Firefox 42, SeaMonkey 2.39 |
| Gecko 41 |
Firefox 41, SeaMonkey 2.38 |
| Gecko 38 |
Firefox 38, SeaMonkey 2.35 |
| Gecko 36 |
Firefox 36, SeaMonkey 2.33 |
| Gecko 35 |
Firefox 35, SeaMonkey 2.32 |
| Gecko 34 |
Firefox 34, SeaMonkey 2.31 |
| Gecko 33 |
Firefox 33, SeaMonkey 2.30 |
| Gecko 32 |
Firefox 32, SeaMonkey 2.29 |
| Gecko 29 |
Firefox 29, SeaMonkey 2.26 |
| Gecko 28 |
Firefox 28, SeaMonkey 2.25 |
| Gecko 27 |
Firefox 27, SeaMonkey 2.24 |
| Gecko 26 |
Firefox 26, SeaMonkey 2.23 |
| Gecko 25 |
Firefox 25, SeaMonkey 2.22 |
| Gecko 24 |
Firefox 24, Thunderbird 24, SeaMonkey 2.21 |
| Gecko 23 |
Firefox 23, SeaMonkey 2.20 |
| Gecko 22 |
Firefox 22, SeaMonkey 2.19 |
| Gecko 21 |
Firefox 21, SeaMonkey 2.18 |
| Gecko 20 |
Firefox 20, SeaMonkey 2.17 |
| Gecko 19 |
Firefox 19, SeaMonkey 2.16 |
| Gecko 18 |
Firefox 18, Firefox OS 1.0, SeaMonkey 2.15 |
| Gecko 17 |
Firefox 17, Thunderbird 17, SeaMonkey 2.14 |
| Gecko 16 |
Firefox 16, Thunderbird 16, SeaMonkey 2.13 |
| Gecko 15 |
Firefox 15, Thunderbird 15, SeaMonkey 2.12 |
| Gecko 14 |
Firefox 14, Thunderbird 14, SeaMonkey 2.11 |
| Gecko 13 |
Firefox 13, Thunderbird 13, SeaMonkey 2.10 |
| Gecko 12 |
Firefox 12, Thunderbird 12, SeaMonkey 2.9 |
| Gecko 11 |
Firefox 11, Thunderbird 11, SeaMonkey 2.8 |
| Gecko 10 |
Firefox 10, Thunderbird 10, SeaMonkey 2.7 |
| Gecko 9 |
Firefox 9, Thunderbird 9, SeaMonkey 2.6 |
| Gecko 8 |
Firefox 8, Thunderbird 8, SeaMonkey 2.5 |
| Gecko 7 |
Firefox 7, Thunderbird 7, SeaMonkey 2.4 |
| Gecko 6 |
Firefox 6, Thunderbird 6, SeaMonkey 2.3 |
| Gecko 5 |
Firefox 5, Thunderbird 5, SeaMonkey 2.2 |
| Gecko 2 |
Firefox 4, Thunderbird 3.3, SeaMonkey 2.1 |
| Gecko 1.9.2 |
Firefox 3.6, Thunderbird 3.1 |
| Gecko 1.9.1 |
Firefox 3.5, Thunderbird 3, SeaMonkey 2.0 |
| Gecko 1.9 |
Firefox 3 |
| Gecko 1.8.1 |
Firefox 2, Thunderbird 2, SeaMonkey 1.1 |
| Gecko 1.8 |
Firefox 1.5, Thunderbird 1.5, SeaMonkey 1.0 |
| Gecko 1.7 |
Firefox 1.0, Thunderbird 1.0, Nvu 1.0, Mozilla Suite 1.7 |
| older versions of Gecko match the Mozilla Suite versions |