I'm developing an extension for manifest v3 on iOS 15.5 and 15.6 simulator. manifest.json is as follows "background": {    "service_worker": "background.js",  }, In the background page developer tool navigator.serviceWorker.register('safari-web-extension://xxx/background.js'); but It looks like the serviceWorker register is not working properly. This works on IOS 16 and above, by the way.