All the previews I've read say that Firefox OS needs high-end hardware to deliver a responsive UI.
"Its unresponsive screen makes typing a laborious process requiring painstaking precision. Every action from swiping to tapping onscreen controls takes a beat until you see results, so using the phone for a prolonged period steals minutes of your time. Lag carries into the camera, which is slow to launch, snap, and reset."[1]
For $90, I would rather have a refurbished iPhone 3GS. A 3GS has 16GB of internal storage vs this phones 512MB and runs Apple's latest iOS 6. With native performance you get a silky smooth experience from the homescreen to apps even on budget hardware.
"Its unresponsive screen makes typing a laborious process requiring painstaking precision. Every action from swiping to tapping onscreen controls takes a beat until you see results, so using the phone for a prolonged period steals minutes of your time. Lag carries into the camera, which is slow to launch, snap, and reset."[1]
For $90, I would rather have a refurbished iPhone 3GS. A 3GS has 16GB of internal storage vs this phones 512MB and runs Apple's latest iOS 6. With native performance you get a silky smooth experience from the homescreen to apps even on budget hardware.
[1] http://news.cnet.com/8301-1035_3-57591716-94/firefox-os-phon...