Recommend Migrating to Modern Browser
ServiceNow recommends that customers use a modern browser for its products and migrate away from Internet Explorer 11 and classic Microsoft Edge due to significant performance issues.
If you are on the New York release and you are using Internet Explorer 11 or Microsoft Edge with any workspaces, such as Service Owner Workspace, Vendor Manager Workspace, or any type of Agent Workspace, you must migrate to a modern browser before you upgrade to future releases. Internet Explorer 11 and classic Microsoft Edge will no longer be supported starting with the Orlando release. Instead, use Microsoft Edge Chromium or one of the other browsers ServiceNow supports.
Significant Performance Issues Compared to Modern Browsers
Internet Explorer 11 can be considerably slower, sometimes up to 2 times slower, when compared to other modern browsers on the ServiceNow platform. Internet Explorer 11 is considered a legacy browser and is not recommended from a perspective of performance.
Reasons for sub-optimal performance in Internet Explorer 11
- AngularJS (modern web development framework)
- Starting in Fuji, ServiceNow began to use Angular JS which creates some additional overhead for browsers
- Utilization of modern web and development standards
- Migration of UI15 to UI16
- In Geneva+ ServiceNow migrated from UI15 to UI16 utilizing a lot more client-side functionality. This exacerbates Internet Explorer 11 performance issues.
- Browser memory leaks
Microsoft Statement on IE11 issues
Microsoft has confirmed with ServiceNow Development that they recognize IE11 processes are leaking memory under certain circumstances and confirmed this is a known issue. They have also clarified that IE11 has been a deprecated browser since January 2016. This issue actually affects not only ServiceNow but all websites using iFrames. We have seen an increase in reports of IE11 having performance issues since the release of Geneva due to the higher use of memory on the client.
Microsoft bug reports
ServiceNow Workarounds (If Unable to Migrate)
- Reduce the number of records in lists to 20
- Reduce memory footprint of client-side code (custom UI scripts, client scripts, UI policies, revert to UI15, etc.)
- Request end users to completely close and reopen their browsers after they have been in use for extended periods of time
- Open all forms and lists outside of an iFrame on a separate tab
- Disable automatic spell checking in IE11
Additionally, refer to the following Community post on Internet Explorer 11 process leaks memory in Windows 7
ServiceNow Product Documentation | Browser Support
Gartner Report | Applying Bimodal to Browser Strategies: Legacy and Modern