A week or so ago this message appeared on the Portfolio page, I assume the Flash Player requirement will be gone soon:
> Google Finance is under renovation. As a part of this process, the Portfolios feature won't be available after mid-November 2017. To keep a copy, download your portfolio.
> Google Finance is under renovation. As a part of this process, the Portfolios feature won't be available after mid-November 2017. To keep a copy, download your portfolio.