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runtime.onBrowserUpdateAvailable

files/en-us/mozilla/add-ons/webextensions/api/runtime/onbrowserupdateavailable/index.md

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{{Deprecated_header}}

Fired when an update for the browser is available, but it isn't installed immediately because a browser restart is required.

Syntax

js-nolint
browser.runtime.onBrowserUpdateAvailable.addListener(listener)
browser.runtime.onBrowserUpdateAvailable.removeListener(listener)
browser.runtime.onBrowserUpdateAvailable.hasListener(listener)

Events have three functions:

  • addListener(listener)
    • : Adds a listener to this event.
  • removeListener(listener)
    • : Stop listening to this event. The listener argument is the listener to remove.
  • hasListener(listener)
    • : Checks whether a listener is registered for this event. Returns true if it is listening, false otherwise.

addListener syntax

Parameters

  • function
    • : The function called when this event occurs.

Examples

Listen for this event:

js
function handleBrowserUpdateAvailable() {
  // handle event
}

browser.runtime.onBrowserUpdateAvailable.addListener(
  handleBrowserUpdateAvailable,
);

{{WebExtExamples}}

Browser compatibility

{{Compat}}

[!NOTE] 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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