portal2 API v2.8.3
There’s been a minor change to the portal2 API as of v2.8.3 (to be deployed at LAN 10.09). Functions which attempt to identify you (usage, usage_history and whoami) will attempt to use cookie-based authentication before attempting to identify your computer by MAC address.
This will allow in-browser applications to determine the identity of who you are logged in as before attempting to fall back to who owns the computer.
In other news, portal2 v2.8.3 now has a couple of other changes to it, such as support for clustering and a new graph on the usage page which is generated client side (and much faster than the server-side graph).