Here's a screencast showing that the "Select Address" UI shows up on sso.mozilla.com, as an example (and shows the complete address record instead of just the relevant bit, i.e. the email address).
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Here's a screencast showing that the "Select Address" UI shows up on sso.mozilla.com, as an example (and shows the complete address record ("abc, 124 happy way, happyville [...]") instead of just the relevant bit, i.e. the email address).