Browser support in Istanbul Browser support varies for each version of the user interface (UI). Most major browsers are supported. Some features have additional browser requirements, which are noted in the appropriate documentation. Browser versions listed in the following table are the latest public release at the time of testing. Table 1. Browser support for each UI version UI version Chrome support Firefox support Internet Explorer support Microsoft Edge support Safari support Tablet mobile browser Phone mobile browser* UI16 Latest public release Latest public release of Firefox or Firefox ESR 9 and up Edge mode is supported Latest public release 9.1 and up Supported Not supported UI15 Latest public release Latest public release of Firefox or Firefox ESR 9 and up Edge mode is supported Latest public release 9.1 and up Supported Supported UI11 Latest public release Latest public release of Firefox or Firefox ESR 9 and up Edge mode is not supported Latest public release 9.1 and up Limited support Limited support *Mobile phone browsers do not support the desktop version of the UI. Instead, mobile browsers use the mobile UI. Internet Explorer notes Compatibility mode is not supported. Setting Security Mode to High (via Internet Options > Security tab) is not supported. While UI16 and UI15 are supported on Internet Explorer 9, the browser may be slow when performing some operations. This slowdown does not necessarily indicate a performance degradation in the instance. Internet Explorer 11 is susceptible to memory leaks, which may impact performance, especially in Windows 7. Safari notes There is a security issue in some versions of Safari. User credentials may be disclosed to an unexpected site via auto-fill. For more information, see the Apple security update. Starting with Safari 9.1 and future versions of Safari, the leave page / stay on page pop-up message only displays once. Exceptions to browser supportCertain applications and features in the Istanbul release have browser requirements that differ from the list of browsers generally supported by the ServiceNow platform.