| name | image | follows | engines | license | development status | date released | Language | Stable version | webBrowser Available in | Website |
|---|---|---|---|---|---|---|---|---|---|---|
| Firefox 3.5 |  | Firefox 3.0 | Gecko | Inactive | 30/06/2009 | 3.5.19 | 75 languages | Website | ||
| Firefox 3.6 |  | Firefox 3.5 | Gecko | Inactive | 21/01/2010 | 3.6.28 | 75 languages | Website | ||
| Firefox 3.0 |  | Firefox 2 | Gecko | Inactive | 17/06/2008 | 3.0.19 | Over 70 languages | Website | ||
| Firefox 4 |  | Firefox 3.6 | Gecko | 22/03/2011 | 3.7a1 | 81 languages | Website |