nsICookieManager2 in Firefox 3.0

 Add a cookie. nsICookieService is the normal way to do this. This
 method is something of a backdoor.

 @param aDomain
        the host or domain for which the cookie is set. presence of a
        leading dot indicates a domain cookie; otherwise, the cookie
        is treated as a non-domain cookie. see RFC2109.
 @param aPath
        path within the domain for which the cookie is valid
 @param aName
        cookie name
 @param aValue
        cookie data
 @param aIsSecure
        true if the cookie should only be sent over a secure connection.
 @param aIsHttpOnly
        true if the cookie should only be sent to, and can only be
        modified by, an http connection.
 @param aIsSession
        true if the cookie should exist for the current session only.
        see aExpiry.
 @param aExpiry
        expiration date, in seconds since midnight (00:00:00), January 1,
        1970 UTC. note that expiry time will also be honored for session cookies;
        in this way, the more restrictive of the two will take effect.

 Find whether a given cookie already exists.

 @param aCookie
        the cookie to look for

 @return true if a cookie was found which matches the host, path, and name
         fields of aCookie

 Count how many cookies would be returned to a given host, ignoring the
 cookie flags isDomain, isSecure, and isHttpOnly. Thus, for a host
 "weather.yahoo.com", host or domain cookies for "weather.yahoo.com" and
 "yahoo.com" would be counted, while a cookie for "my.weather.yahoo.com"
 would not.

 @param aHost
        the host string to look for, e.g. "google.com". this should consist
        of only the host portion of a URI, and should not contain a leading
        dot, a port, etc.

 @return the number of cookies found.

 Import an old-style cookie file. Imported cookies will be added to the
 existing database. If the database contains any cookies the same as those
 being imported (i.e. domain, name, and path match), they will be replaced.

 @param aCookieFile the file to import, usually cookies.txt