windows.onCreated

Fired when a window is created.

Syntax

browser.windows.onCreated.addListener(listener)
browser.windows.onCreated.removeListener(listener)
browser.windows.onCreated.hasListener(listener)

Events have three functions:

addListener(callback)

Adds a listener to this event.

removeListener(listener)

Stop listening to this event. The listener argument is the listener to remove.

hasListener(listener)

Check whether a listener is registered for this event. Returns true if it is listening, false otherwise.

addListener syntax

Parameters

callback

Function that will be called when this event occurs. The function will be passed the following arguments:

window

A windows.Window object containing details of the window that was created.

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
onCreated Yes 14 45 ? Yes 14 ? ? No ?
15Fires a pair of events: one for private browsing, one for regular browsing.
 ?

Examples

Log the IDs of new windows as they are created:

browser.windows.onCreated.addListener((window) => {
  console.log(`New window: ${window.id}`);
});

Example extensions

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

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/windows/onCreated