Not much, according to this article, as there are many firmware blobs that are still entirely opaque: http://blogs.coreboot.org/blog/2015/02/23/the-truth-about-

Not much, according to this article, as there are many firmware blobs that are still entirely opaque: http://blogs.coreboot.org/blog/2015/02/23/the-truth-about-purism-why-librem-is-not-the-same-as-libre/ http://blogs.coreboot.org/blog/2015/02/23/the-truth-about-pu...