The question is more, who would back the effort, money wise?
in fact, the browser is not firefox, but gecko + xulrunner, which has been deprecated upstream(and I guess hence is maintained by Jolla only?)
About the xperia IV et al updates; I bought the 10iv as well, and started to regret it first when i noticed that c2 has a better camera, then when it surfaced that camera wont be working still for a while, namely until sony provides better blobs…
you see where this is going right? I hope I am wrong, but considering the shrinking market size of the xperias, and the current financial trends…three hints make a proof, right? (I hate to be right btw prove me.wrong please )