You can close tabs in a browser that are associated with a specific domain like "foo.com" using the following JavaScript code
function close_tabs(domain_name) { // get all the open windows var windows = window.open('', '_blank'); // loop through all the open windows for (var i = 0; i < windows.length; i++) { // check if the window's URL includes domain_name if (windows[i].location.href.indexOf(domain_name) > -1) { // close the window windows[i].close(); } } } close_tabs( "foo.com");