chrome extension onInstalled event

Question

I have a question about chrome extension install/update event. If I add the onInstalled event listener in a top level code in the background script, is there a time frame in

Answer 1

I needed to figure this out too. While I didn't find anything authoritative, I did throw a couple of console.time() statements in my background script.

Code was something like this:

console.time('onInstall event');
console.time('first function');

chrome.runtime.onInstalled.addListener(details => {
  console.timeEnd('onInstall event');
});

// 7 module imports

someSyncFunction() // console.timeEnd('first function') is called in the first line in this function

Then I just loaded/reloaded the extension (unpacked, in dev mode) a few times. onInstall seems to pretty reliably fire within the first 50ms, while the first function happens w/in the first ms. Here are the results:

(First function, onInstall event)
(.282ms, 47.2ms)
(.331ms, 45.3ms)
(.327ms, 49.1ms)
(.294ms, 45.9ms)