I'm pretty sure about it. Please, remember that B2G for quite a while was a "homemade style" experiment started by Andreas.
It took Mozilla quite a while before executive team started considering it and investing in it.
The post I linked sums up the vibe from the very beginning.
I believe that there was time when the goals have shifted to aim at producing a real product and gaining market share etc., but the original goals are stated in the post and I believe we are very successful in accomplishing them.