This page is part of the documentation for the Chrome Apps platform, which was deprecated in 2020. Chrome Apps in Kiosk Mode used by Enterprise and Education customers will no longer be supported after April 2027, marking their end of life. Additionally, all remaining Chrome Apps used in managed environments by Enterprise and Education organizations will reach their end of life in October 2028. Learn more about migrating your app.

Manifest - Key

This value can be used to control the unique ID of an extension, app, or theme when it is loaded during development.

To get a suitable key value, first install your extension from a .crx file (you may need to upload your extension or package it manually). Then, in your user data directory, look in the file Default/Extensions/_<extensionId>_/_<versionString>_/manifest.json. You will see the key value filled in there.