Even when ignoring the clunky UI, asynchronous background calls are much slower than in the old version. In almost 80% of cases, I now get a browser alert ("Are

Even when ignoring the clunky UI, asynchronous background calls are much slower than in the old version. In almost 80% of cases, I now get a browser alert ("Are you sure you want to navigate away? Changes will be lost") when trying to close the tab a few seconds after performing an action (e.g. starring a message, mark as read). This never happened before and it's super annoying.