I think I might need to buy a smartphone, but I don't want to use any of the 3 most used OS's: Android, iOS, and WindowsPhone. I'm looking for a Linux-based OS that respects user privacy, that doesn't have as many useless "apps" as the other 3 big players, and is (almost) fully open source. I also need to be able to delete any "app" that I want, and to use a sandboxed Firefox inside the OS itself. Is there such a thing? I was looking at FirefoxOS, but I don't know much about it.