| VSTheme | | - | |
| Utopia White | | - | |
| Utopia FFSE White | | - | |
| Unofficial Tango | | - | |
| Ubuntu Human Theme | | - | |
| Twitter Inspire | | - | |
| TwentyTen2 | | - | |
| Toy Factory | | - | |
| Tangofox? | | - | |
| Tango Icons | | - | |
| Tango Firefox Theme | | - | |
| Tango FX4 | | - | |
| Tangerinefox | | - | |
| Tangerine Firefox Theme | | - | |
| Tabs Really On Top | | - | |
| Strike | | - | |
| Stratini Super | | - | |
| StrataStripe | | - | |
| StrataM 4 | | - | |
| Strata XP on Linux | | - | |
| Strata XP | | - | |
| Strata Toolbar Icons | | - | |
| Strata RELOADED | | - | |
| Square Cut | | - | |
| SphereGnome_Jumbo | | - | |
| SphereGnome_Big | | - | |
| SphereGnome | | - | |
| SmallringFX DARKOrange | | - | |
| SmallringFX DARKMagenta | | - | |
| SmallringFX DARKGreen | | - | |
| SmallringFX DARKGold | | - | |
| SmallringFX DARKBlue | | - | |
| Sky Pilot Classic RC2 | | - | |
| Sky Orange FF | | - | |
| Sky Fall | | - | |
| Sir.Community | | - | |
| Simply Blue | | - | |
| Simpler Red | | - | |
| Simple White X | | - | |
| Simple White Compact | | - | |
| Simple White | | - | |
| Simple Green | | - | |
| Simple Black | | - | |
| Silvermel | | - | |
| Silver Skin | | - | |
| ShineGUI | | - | |
| Shine Skin | | - | |
| Shine Bright Skin (Firefox 4，Aero) | | - | |
| Shine Aero | | - | |
| ShadowThunder I | | - | |