I've noticed that the Vietnamese locale used to use UTF-8 as the
fallback encoding and recently changed to ISO-8859-1 (which is an
alias for windows-1252). This changes an improvement compared to using
UTF-8 as the fallback, but the result is change considering that
Chrome and IE use windows-1258 as the fallback encoding for the
Vietnamese locale.
Why doesn't Firefox use windows-1258 as the fallback encoding for the
Vietnamese locale?