[[Image:Qrcode-fennec-nightly-android.png|right]]
If you are actively developing or testing Firefox features that are '''not yet released''' to the Aurora or Beta channels, you can download a Nightly build. You may install and use Nightly on the same device with alongside builds from other channels (Firefox, Beta, Aurora and Firefox).
The nightly channel is a snapshot of our very latest development work, before it is ready for widespread testing. This is our least stable update channel, and is not recommended for most users. Nightly builds provide an early preview of work that will eventually be included in Firefox 6 or later. Nightly will offer to update itself automatically about once a day with the latest changes from our developers.