Sent to the event page just before it is unloaded. This gives the extension an opportunity to do some cleanup. Note that since the page is unloading, any asynchronous operations started while handling this event are not guaranteed to complete.
Note: If something prevents the event page from being unloaded, the
runtime.onSuspendCanceled event will be sent and the page won't be unloaded.
browser.runtime.onSuspend.addListener(listener) browser.runtime.onSuspend.removeListener(listener) browser.runtime.onSuspend.hasListener(listener)
Events have three functions:
Adds a listener to this event.
Stop listening to this event. The
listenerargument is the listener to remove.
Checks whether a
listeneris registered for this event. Returns
trueif it is listening,
The function called when this event occurs.
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