Hi @friedger sorry about the confusion!
As of the next release of Blockstack v0.17 - the browser will use name owner addresses and bitcoin wallet addresses that are both derived from the 12 word identity key you backed up when setting up the browser. (see https://github.com/blockstack/blockstack-browser/issues/749)
They are unrelated and completely separate wallets.
In earlier versions, we used the wallet address of the now deprecated command line interface (see https://github.com/blockstack/blockstack/issues/352).
To transfer your name from the wallet in the command line interface, you’ll need to run a transfer operation to an address of a Blockstack ID in the browser.