What is the volume of the mozilla mailing lists and other forums? The guidelines for creating a standalone stackexchange site within the ecosystem are reasonable, and most could easily be met by Mozilla contributors:
- 15 questions per day on average is a healthy beta (and, by extension, 40 posts total is good)
- 90% questions answered is a healthy beta
- Every site needs a solid group of core users to assist in moderating the site. We recommend:
- 150 users with 200+ rep
- 10 users with 2,000+ rep
- 5 users with 3,000+ rep
- 2.5 answers per question is good
- 1,500 visits per day is good.
- Eventually, 90% of a site's traffic should come from search engines.
I think that the only ones that might not be readily fulfilled are the last two - although if the entire Mozilla community makes the effort to shift to this format as much as possible, then they might be successful on that front.
If you aren't certain these objectives could be met (or you can't get the SE Inc team to permit less-than-optimal-usage), personally I'd set up my own OSQA or similar and run with it.
The Mozilla community's programming questions could certainly be discussed here, and programming design discussions on programmers, and so forth - with questions spread throughout the network, but honestly it would be better to have it all in one place, and be able to field questions that would still fall outside the SE network.
There's a lot going on in Mozilla, and I think a lot more discussion could be organized and performed within the Q&A format - feature discussions, such as we have here on Meta, for instance.
I expect that SE Inc would require the effort to go through Area51, though, and it might simply be better to strike out on your own.