MV3 lifetime test

background.worker.js

// Respond to CS
const startTime = Date.now()
const delay = 13000;
chrome.runtime.onMessage.addListener( (message, sender, respond) => {
	setTimeout(respond, delay, Math.round((Date.now() - startTime + delay) / 1000));
	return true
})

// Overlapping fetch requests
console.log('will req');
let id = new Date().getMinutes() + ':'
let i = 0;
chrome.storage.local.get().then(console.log)
setInterval(async () => {
	const thisId = id + i;
	i++;
	console.log(thisId, 'req')
	chrome.storage.local.set({[thisId]: 'req'})
	await fetch('https://deelay.me/19000/https://pixiebrix.com')
	console.log(thisId, 'req done')
	chrome.storage.local.set({[thisId]: 'req done'})
}, 13000);

content.js

console.log('Starting');
setInterval(() => {
	console.log('sending')
	chrome.runtime.sendMessage('lifetime in seconds', console.log)
}, 7000);

manifest.json

{
  "manifest_version": 3,
  "name": "MV3 test",
  "version": "0.0.0",
  "permissions": ["storage"],
  "background": {
    "service_worker": "background.worker.js"
  },
  "content_scripts": [
    {
      "matches": ["*://*/*"],
      "js": ["content.js"]
    }
  ]
}