Is that OSS? I'm sure people would love to try it even if it involves sideloading and such.
Pretty sure all the changes are in mozilla-central.
https://hg.mozilla.org/mozilla-central/file/tip/embedding/io...
Sorry I dont know where we keep the build instructions.
It is. Mozilla has an iOS port of Gecko. It runs well, even without the JIT, but we are not allowed to use it.