It's not the browser which processes the querystring separator, it's the server side which needs to know to process the semicolon. So if you're using a recent CGI.pm or Apache.pm on the server side, everything's fine. But there's a lot of other CGI processing modules (mostly for other languages) which cannot process the semicolon separator (hit me two times in the last six months).

You can find the ";" proposal in RFC 1866, section 8.2.1.

In reply to Re: Why does CGI::query_string make semicolons the rule, not the exception? by eserte
in thread Why does CGI::query_string make semicolons the rule, not the exception? by esharris

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