Updated at: May 6, 2026
Gecko is developed by the Mozilla Foundation.
| Browser Name | Rendering Engine | Timeline | Device Type | Operating Systems | Status |
|---|---|---|---|---|---|
| Firefox | Gecko | 2004 → | Desktop & Mobile | Android, iOS, BSD, Linux, macOS, Windows | Active |
| AmiZilla | Gecko | 2003 - 2009 | Desktop | Amiga OS | Discontinued |
| aMozillaX | Gecko | 1999 | Desktop | Amiga OS | Discontinued |
| Arctic Fox | Gecko | 2018 → | Desktop | BSD, Linux, macOS, Windows | Active |
| Beonex Communicator | Gecko | 2003 - 2004 | Desktop | BSD, Linux, macOS, Windows | Discontinued |
| Bezilla | Gecko | 1998 - 2007 | Desktop | BeOS, Haiku | Discontinued |
| Browsh | Gecko | Unknown | Desktop | BSD, Linux, macOS, Windows | |
| CachyOS Browser | Gecko | 2021 - 2025 | Desktop | Linux | Discontinued |
|
Camino
Formerly Chimera
|
Gecko | 2002 - 2012 | Desktop | OS X | Discontinued |
| Cliqz | Gecko | 2015 - 2021 | Desktop | macOS, Windows | Discontinued |
| Comodo Ice Dragon | Gecko | 2010 → | Desktop | Windows | |
| Conkeror | Gecko | 2008 - 2017 | Desktop | Unix-like | Discontinued |
| Dot Browser | Gecko | 2022 - ? | Desktop & Mobile | Android, Linux, macOS, Windows | Abandoned |
| Fennec | Gecko | 2008 → | Mobile | Android | Active |
| FireDragon | Gecko | 2024 → | Desktop | Linux | |
| Firefox Developer Edition | Gecko | 2017 → | Desktop | Linux, macOS, Windows | Active |
| Firefox Focus | Gecko | 2015 → | Mobile | Android, iOS | |
| Floorp | Gecko | 2021 → | Desktop | Linux, macOS, Windows | Active |
| Galeon | Gecko | 2000 - 2008 | Desktop | Unix-like | Discontinued |
| Ghostzilla | Gecko | 2002 | Desktop | Windows | Discontinued |
| Glide | Gecko | 2025 → | Desktop | Linux | Active |
| Gzilla | Gecko | 1998 - 1999 | Desktop | Linux | Discontinued |
| Helix | Gecko | 2023 - 2024 | Desktop | Linux | Abandoned |
| IceCat | Gecko | Unknown | Desktop | Linux, macOS, Windows | Idle |
| Iceraven | Gecko | Unknown | Mobile | Android | |
| Iceweasel | Gecko | 2006 - 2016 | Desktop | Linux | Discontinued |
| InterWebSnow | Gecko | 2021 - 2022 | Desktop | OS X | Abandoned |
| Ironfox | Gecko | 2025 → | Mobile | Android | Active |
| Kylo | Gecko | 2010 - 2019 | Desktop | Windows, OS X | Discontinued |
| LibreWolf | Gecko | 2020 → | Desktop | Linux, macOS, Windows | Active |
| Marble Browser | Gecko | 2025 → | Desktop | Linux, macOS, Windows | |
| Mercury Browser | Gecko | 2022 - 2024 | Desktop | Linux, macOS, Windows | Abandoned |
| MicroB | Gecko | 2007 - 2008 | Desktop | Misc Desktop OS | Discontinued |
| Midori | Gecko | 2007 → | Desktop & Mobile | Android, Linux, macOS, Windows | Active |
| Minimo | Gecko | 2004 - 2007 | Mobile | Windows CE | Discontinued |
| Mull-Fenix | Gecko | 2017 - ? | Mobile | Android | Discontinued |
| Mullvad | Gecko | 2009 → | Desktop | Linux, macOS, Windows | |
| Mypal | Gecko | 2022 → | Desktop | Windows | Active |
| Netscape | Gecko | 1994 - 2008 | Desktop | Linux, macOS, Windows, HP-UX | Discontinued |
| Nocturne | Gecko | 2015 → | Desktop | Windows | Active |
| PlasmaFox | Gecko | 2019 - 2021 | Desktop | Linux | Discontinued |
| PowerFox | Gecko | 2026 → | Desktop | OS X | |
| Pulse Browser | Gecko | 2021 - 2024 | Desktop | Linux | Discontinued |
| r3dfox | Gecko | 2024 → | Desktop | Windows | Active |
| SeaLion | Gecko | 2023 → | Desktop | Linux, macOS | |
|
SeaMonkey
Formerly Iceape
|
Gecko | 2005 → | Desktop | Linux, macOS, Windows | |
| Skyfire | Gecko | 2008 - 2014 | Mobile | Android, iOS, Symbian, Windows Mobile | Discontinued |
| Slim Browser | Gecko | ? - 2023 | Desktop | Windows | Discontinued |
| Sunbird | Gecko | 2003 - 2010 | Desktop | Linux, macOS, Windows, Solaris | Discontinued |
| Swiftfox | Gecko | 2005 - 2017 | Desktop | Linux | Discontinued |
| Swiftweasel | Gecko | 2007 - 2009 | Desktop | Linux | Discontinued |
| TenFourFox | Gecko | 2010 - 2020 | Desktop | OS X | Discontinued |
| Timberwolf | Gecko | 2010 - 2012 | Desktop | Amiga OS | Discontinued |
| Tor Browser | Gecko | 2008 → | Desktop & Mobile | Android, BSD, Linux, macOS, Windows | |
| Waterfox | Gecko | 2011 → | Desktop & Mobile | Android, Linux, macOS, Windows | Active |
| Waterfox Classic | Gecko | 1998 - 2022 | Desktop | Linux, macOS, Windows | Discontinued |
| WebLibre | Gecko | 2024 → | Mobile | Android | Active |
|
xB Browser
Formerly TorPark and Xerobank browser
|
Gecko | 2006 - 2009 | Desktop | Windows | Discontinued |
| Zen | Gecko | 2024 → | Desktop | Linux, macOS, Windows | Active |