One new feature in UEFI 2.5 is HTTP Boot, an alternative to PXE-based TFTP booting. I’ve made 2 blog posts on it so far:
Right now, HP supports it, and Intel is adding an implementation to Tianocore. In the last day, it appears that Intel’s beginning to add their implementation to the EDK-II trunk. In the NetworkPkg, there are a few new directories, apparently mostly related to a new HttpBootDxe driver. For more information, look at the edk2-devel mailing list archives, or the EDK-II trunk in the NetworkPkg.
Firmware Security 