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/Web Extensions

tabs.onRemoved

Fired when a tab is closed.

Syntax

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

tabId
integer. ID of the tab that closed.
removeInfo
object. The tab's window ID, and a boolean indicating whether the window is also being closed.

Additional objects

removeInfo

windowId
integer. The window whose tab is closed.
isWindowClosing
boolean. true if the tab is being closed because its window is being closed.

Examples

Listen for close events, and log the info:

function handleRemoved(tabId, removeInfo) {
  console.log("Tab: " + tabId + " is closing");
  console.log("Window ID: " + removeInfo.windowId);
  console.log("Window is closing: " + removeInfo.isWindowClosing);
}

browser.tabs.onRemoved.addListener(handleRemoved);

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
onRemoved
Yes
14
45
?
Yes
14
?
?
54
?
?
?

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

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.

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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/onRemoved