Important: Chrome will be removing support for Chrome Apps on all platforms. Chrome browser and the Chrome Web Store will continue to support extensions. Read the announcement and 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.
Note: You don't usually need to use this value. Instead, write your code so that the key value doesn't matter by using relative paths and extension.getURL.
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.