LockerService Disabled for Unsupported Browsers

LockerService relies on some JavaScript features in the browser: support for strict mode, the Map object, and the Proxy object. If a browser doesn’t meet the requirements, LockerService can’t enforce all its security features and is disabled.

LockerService is disabled for unsupported browsers. If you use an unsupported browser, you’re likely to encounter issues that won’t be fixed. Make your life easier and your browsing experience more secure by using a supported browser.

Note

Note

The LockerService requirements align with the supported browsers for Lightning Experience, except for IE11. LockerService is disabled for IE11. We recommend using supported browsers other than IE11 for enhanced security.