STR: 1. Be in a multi-user chat where a user's nick is a prefix of another; for example, irc://irc.mozilla.org/instantbird often has "Mic" and "micahg" 2. Type a unique-enough prefix ("mi") 3. Press tab Expected results: Since the completion completely matches one nick, normalize the case to match ("Mic"); whether the usual ": " is added is optional (probably not, in fact.) Actual results: The completion works, but the case is unchanged: "mic"