claim your address
Pick a username on a server you have pinned. This is what people write to.
Already registered this identity in another browser? Look the address up
instead — this checks it resolves to this identity and claims nothing.
recovery secret
your server
Pinning a server's public key is what lets this client tell your real server
from anything pretending to be it. Ask its operator for the key over a channel you already
trust.
why does this matter?
Nothing else authenticates the server, so an unpinned host could be anyone —
registering, looking up an address and fetching all refuse to run against one.
backup & transfer
One file holding your mail, contacts and pinned servers — for moving to
another browser, or for keeping what the server no longer has.
what is in the file, and is it safe?
It is sealed to this identity: only a browser with this secret restored can
open it. It deliberately leaves the secret itself out — that belongs in a password
manager, not in a file in your downloads folder.