The ID of the extension.


var myAddonId =;


A string representing the add-on ID. If the extension specified an ID in its applications manifest.json key, will contain that value. Otherwise, will contain the ID that was generated for the extension.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxOperaFirefox for Android
idChrome Full support 22Edge Full support 14Firefox Full support 45Opera Full support 15Firefox Android Full support 48


Full support  
Full support


This API is based on Chromium's chrome.runtime API. This documentation is derived from runtime.json in the Chromium code.

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