Is there any development or performance optimization plan about spidermonkey？

Hi, I am a mips application development programmer, I have contribute some code to bugzilla.mozilla last year, almost all of this code is about the MIPS platform. I want to do some more about spidemonkey, so I read some documents about js engine, and also the code.

I think if the community has any development plans I can join, or if you have any suggestions, it will be very helpful, thank you.