| FOXSCAPE | | - | |
| Extero 2 V4 (Minty Green) | | - | |
| Ex Aequo | | - | |
| Everything Elio | | - | |
| Eternal Aqua Safire Graphite 1.5 | | - | |
| Ecology | | - | |
| EarthShift | | - | |
| Doodle Plastik | | - | |
| Doodle Classic | | - | |
| Devious Green ［updated］ | | - | |
| Default Mod | | - | |
| DeLorean_varNaM-Firefox | | - | |
| DarkWaters | | - | |
| DarkBlood | | - | |
| Dark Revisited | | - | |
| Dark Orange Fox | | - | |
| Crystal GT | | - | |
| CrApple | | - | |
| Colorized Default | | - | |
| ColorGnome | | - | |
| Color Toolbar Icons | | - | |
| CloudGnome | | - | |
| Classic Compact | | - | |
| Cheser | | - | |
| Charamel | | - | |
| Camino | | - | |
| BuuFirefox | | - | |
| Brushed | | - | |
| Brisk | | - | |
| Bright Aero | | - | |
| Bricks for Firefox | | - | |
| Bricks | | - | |
| Breeze | | - | |
| BlueShift | | - | |
| BlueQute | | - | |
| Blue2 | | - | |
| Blue Shift | | - | |
| Blue Ice Reloaded | | - | |
| Bloomind FT SleekDark | | - | |
| Bloomind FT SilverGlow | | - | |
| Bloomind FT PureWhite 2 | | - | |
| Bloomind FT GraphiteGlow | | - | |
| Bloomind FT Evo | | - | |
| Bloomind FT DeepDark 2 | | - | |
| BlackX 2.0 | | - | |
| BlackX | | - | |
| BlackJapanMAX | | - | |
| BlackJapan | | - | |
| BlackFox V1-Blue | | - | |
| BlackFox V1 | | - | |