I think firefox OS is mainly targeting Nokia's Asha lineup market, and maybe low-end android devices but it is not meant to go full steam against Android
In the case of Ubuntu touch, nadhani inakuja kucompete directly with the big boys iOS, Android, WP8, and BB OS... it will be lucky kama itaweza kugombania third spot against WP8 na BB 10 but things don't look good for them ingawa the convergence idea is pretty slick. Linux kwenye desktop hasn't kicked off and on Mobile iliishia in the hands of enthusiasts tu, remember Maemo, Meego, Moblin, Open Moko.. etc, and Now Ubuntu Touch na Jolla.
As much as I would like to see these OS come and offer other choices, it will be hard for them. But no harm done, they are all Open Source and they will push development of other platforms even if they are doomed to fail.