---
schema_version: "1"
id: e02d6f5c660e82e70a69332d5e22209dfdcb17d641ce85fa78183dc8c80cf2a8
title: Lightning Locker Disabled for Unsupported Browsers
collection: developer
version: current
locale: en-us
portal_url: https://docs.salesforce.com/developer/current/en-us/lwc/lightning-components-security/guides/locker/locker-unsupported.md
canonical_url: https://developer.salesforce.com/docs/platform/lightning-components-security/guide/locker-unsupported.html
source_site: developer.salesforce.com
content_type: documentation
content_hash: 8ae066f00f4d8d96130ca84886b4f73bbdb1c59fb77601e98a5798e4cd536100
products:
  - Security for Lightning Components
  - lwc
---
# Lightning Locker Disabled for Unsupported Browsers

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

Lightning Locker is enabled in the supported browsers for Lightning Experience. If your app runs in an unsupported browser, you’re likely to encounter issues that won’t be fixed. Make your life easier, and your user’s browsing experience more secure, by requiring your app to run in a supported browser.

**See Also**

- [_Lightning Web Components Developer Guide_: Supported Browsers](/docs/platform/lwc/guide/get-started-supported-browsers.html)
- [_Lightning Aura Components Developer Guide_: Browser Support for Aura Components](https://developer.salesforce.com/docs/atlas.en-us.lightning.meta/lightning/intro_browsers.htm)
- [_Salesforce Help_: Supported Browsers for Lightning Experience](https://help.salesforce.com/s/articleView?id=xcloud.getstart_browsers_sfx.htm)
- [_Salesforce Help_: Recommendations and Requirements for All Browsers](https://help.salesforce.com/s/articleView?id=xcloud.getstart_browser_recommendations.htm)