runtime.onStartup
Fired when a profile that has this extension installed first starts up. This event is not fired when a private browsing (incognito) profile is started, even if this extension is operating in 'split' incognito mode.
Note:When using an event page or background service worker, the extension must add a listener toruntime.onStartup on the event page for the event page to be executed at least once per browser session.
Syntax
browser.runtime.onStartup.addListener(listener)browser.runtime.onStartup.removeListener(listener)browser.runtime.onStartup.hasListener(listener)Event Functions
All events have three functions:
addListener(listener)Adds a
listenerto the calling event.removeListener(listener)Stop listening to the calling event. The
listenerargument is the listener to remove.hasListener(listener)Checks whether a
listeneris registered for the calling event. Returnstrueif it is listening,falseotherwise.
Parameters
The only parameter islistener, used for any of the above functions.
listenerThe function called when this event occurs.
Examples
Openhttps://giphy.com/explore/cat when the browser starts up:
function handleStartup() { browser.tabs.create({ url: "https://giphy.com/explore/cat", });}browser.runtime.onStartup.addListener(handleStartup);Browser compatibility
Note:This API is based on Chromium'schrome.runtime API. This documentation is derived fromruntime.json in the Chromium code.