You're comparing apples to oranges. WebOS was closed source with limited hardware vendors. FireFox OS is open source, open to all hardware vendors.
Good platforms tend to do well in the marketplace because they attract investment from the outside world. Android is beating iOS because it's a better platform for vendors. FireFox OS is not only a better platform for vendors than iOS, it may turn out to be a better platform for devs than both iOS and Android.
You're comparing apples to oranges. WebOS was closed source with limited hardware vendors. FireFox OS is open source, open to all hardware vendors.
Good platforms tend to do well in the marketplace because they attract investment from the outside world. Android is beating iOS because it's a better platform for vendors. FireFox OS is not only a better platform for vendors than iOS, it may turn out to be a better platform for devs than both iOS and Android.