manifest.json

{
	"manifest_version": 3,
	"name": "Test OSD, EXTPage & SW",
	"short_name": "XXX",
	"version": "0.0.0.1",
	"description": "bla bla bla",
	"background": {
		"service_worker": "worker_wrapper.js"
	},
	"chrome_url_overrides": { "newtab": "newpage.html" },
	"action": {
		"default_icon": {
			"128": "img/ico128.png",
			"16": "img/ico16.png"
		}
	},
	"permissions": [
		"offscreen"
	]
}