This app allows you to experience Firefox OS on almost any Android device, sort of
With Android and iOS dominating the mobile platform space, it's sometimes "convenient" to forget that they are just two of the bigger fish in a large pond, which is home to other, not-so-popular members of the same niche. Windows Phone, BlackBerry OS, and Firefox are also battling for market share, and while the majority of smartphone user will hardly ever have the chance to give all of them a spin and take the good with the bad, Mozilla has recently made it easier for willing users to experience its Firefox OS. Sort of.
Core features of Firefox OS, like switching between apps by swiping left or right from the edges of the screen, are on board, but it's worth mentioning that this "preview" of Mozilla's platform for Android devices is nowhere near usable as a daily driver - apart from the numerous conflicts with Android, the launcher is extremely laggy and is performing in a mediocre fashion.
Hence, don't expect it to amaze you with silky-smooth transitions and something truly unique in terms of user experience. That said, it's still doing its main job well, i.e. allows you to see what Mozilla has been working on for the mobile market.
Things that are NOT allowed: