Update text about the service worker lifetime and the time limit to the lifetime extension
Update text about the service worker lifetime and the time limit to the lifetime extension

mkruisselbrink/ServiceWorker,chadoliver/ServiceWorker,zuzusik/ServiceWorker,zuzusik/ServiceWorker,martinthomson/ServiceWorker,karolklp/ServiceWorker,justinleoye/ServiceWorker,chadoliver/ServiceWorker,justinleoye/ServiceWorker,martinthomson/ServiceWorker,zuzusik/ServiceWorker,slightlyoff/ServiceWorker,mkruisselbrink/ServiceWorker,chadoliver/ServiceWorker,karolklp/ServiceWorker,martinthomson/ServiceWorker,slightlyoff/ServiceWorker,justinleoye/ServiceWorker,karolklp/ServiceWorker