title: Web standard to open link in existing open tab
body: <p>On a desktop, if I have application A open and then in application B, click on a link to application A, it does not usually open a new application, instead the link opening is handled by the existing open instance of application A.  Is this possible for a website?  i.e. is there a way for a website domain to tell the browser that when a page to that website domain A is open in one of the browser's tabs, that a user's click on a link for that domain A from a different application or tab and domain, can be handled by the open tab for domain A?</p>