I'm still waiting for my build of mozilla-central to finish. Gonna have to wait till tomorrow morning to complete. PC upgrade is definitely the next big spend after christmas.

Besides, necko-wifi and gstreamer, I'm not sure if vp8/webm support is working yet, if wanted. Microb config also disables necko:
With regards to patches, I don't know if there are some features that can be safely disabled. I've seen some SMS, telephony, battery, contacts objects being compiled, are they really necessary? I know microb has patches to disable filepicker, dropservice and a few more so it might be worth checking over microb config and comparing with the current version, if flags are still valid.