| Operating system | Developer | First release |
|---|---|---|
| B2G OS | — | — |
| ChorusOS | Chorus Systèmes, Oracle Corporation, Sun Microsystems, Institut National de Recherche en Informatique et en Automatique | — |
| Firefox OS | Mozilla Foundation, Mozilla Corporation | — |
| Operating system | Developer | First release |
|---|---|---|
| B2G OS | — | — |
| ChorusOS | Chorus Systèmes, Oracle Corporation, Sun Microsystems, Institut National de Recherche en Informatique et en Automatique | — |
| Firefox OS | Mozilla Foundation, Mozilla Corporation | — |