YAIR (Yet Another Inbox Revamp) is a Chrome extension to overhaul the Reddit private messaging system, providing a more streamlined interface for dealing with private messages.
YAIR isn't just a pretty frontend for your inbox; it provides functionality on top, largely inspired by Gmail. You can save or archive message threads on a thread-by-thread basis, or select multiple message threads to perform bulk actions on them. YAIR saves drafts for you automatically, so if you get interrupted writing your message, you can close the page and pick up right where you left off later.
Read more about YAIR in the announcement post here: https://www.reddit.com/cojbpi/