function makeCookieObject(cookie)
{
    // Remember the raw value.
    var rawValue = cookie.value;

    // Unescape '+' characters that are used to encode a space.
    // This isn't done by unescape method.
    var value = cookie.value;
    if (value) {
        value = value.replace(/\+/g, " ");
    }

    var optionValue = "";
    var optionRowValue = "";
    if ( value.indexOf("%") != -1 ) {
        try {
           optionValue = GetEscapeCodeType(value);
           optionRowValue = " : charset( " + optionValue + " )";
           if ( optionValue == "UTF8" ) {
               optionValue = UnescapeUTF8(value);
           }
           if ( optionValue == "EUCJP" ) {
               optionValue = UnescapeEUCJP(value);
           }
           if ( optionValue == "SJIS" ) {
               optionValue = UnescapeSJIS(value);
           }
           if ( optionValue == "Unicode" ) {
               optionValue = unescape(value);
           }
        } catch( e ) { optionValue = value }
    }
    else {
        optionValue = value;
    }

    var c = { 
        name        : cookie.name,
        value       : optionValue,
        isDomain    : cookie.isDomain,
        host        : cookie.host,
        path        : cookie.path,
        isSecure    : cookie.isSecure,
        expires     : cookie.expires,
        isHttpOnly  : cookie.isHttpOnly,
        rawValue    : rawValue + optionRowValue
    };

    return c;
}

<overlay xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> 
    <script src="chrome://firecookie/content/fireCookie.js" type="application/x-javascript"/> 
    <script src="chrome://firecookie/content/ecl.js" type="application/x-javascript"/>