tabs.onCreated

Fired when a tab is created.

Note that the tab's URL may not be given its final value at the time this event fired. In particular, Firefox opens a new tab with the URL "about:blank" before loading the new page into it. You can listen to tabs.onUpdated events to be notified when a URL is set.

Syntax

browser.tabs.onCreated.addListener(callback)
browser.tabs.onCreated.removeListener(listener)
browser.tabs.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 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:

tab: tabs.Tab. Details of the tab that was created.

Examples

Log the IDs of newly created tabs:

function handleCreated(tab) {
  console.log(tab.id);
}

browser.tabs.onCreated.addListener(handleCreated);

Example extensions

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	?	?	54	?	15	?

Note: This API is based on Chromium's chrome.tabs API. This documentation is derived from tabs.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/tabs/onCreated