>If I perform the below browse codes, it will display the table A first then the table B.
>SELECT A
>BROWSE
>SELECT B
>BROWSE
>But if I add a ";" before the second browse like:
>SELECT A
>BROWSE
>***;
>SELECT B
>BROWSE
>The second browse will display table A instead of B, is it a bug?

No - the leading asterisk in the preceding line indicates the line is a comment; adding a ';' to the end of the line indicates that the command continues on the next line, so effectively, the SELECT B is part of a comment. The behavior is -exactly- as specified by the language; the ';' has a specific purpose in VFP.