Extra information about a transition. Note that many values here are not currently supported in Firefox: see the browser compatibility table for details.


Values of this type are strings. Possible values are:


Redirect(s) caused by JavaScript running in the page or a "refresh" pragma in the page's meta tag.


Redirect(s) caused by a 3XX HTTP status code sent from the server.


The user used the forward or back button to trigger the navigation.


The user triggered the navigation from the address bar.

Browser compatibility

BCD tables only load in the browser

Note: This API is based on Chromium's chrome.webNavigation API. This documentation is derived from web_navigation.json in the Chromium code.