Mozilla announced that the background page is deprecated and we need to migrate to service workers on manifest v3. https://blog.mozilla.org/addons/2021/05/27/manifest-v3-update/ There are some information to migrate background page to service workers: * [[request] Manifest V3 serviceWorker example · Issue #528 · GoogleChrome/chrome-extensions-samples](https://github.com/GoogleChrome/chrome-extensions-samples/issues/528) * [javascript - Chrome extension - migrate from manifest v2 to v3 - Stack Overflow](https://stackoverflow.com/questions/65311898/chrome-extension-migrate-from-manifest-v2-to-v3) * [Manage events with service workers - Chrome Developers](https://developer.chrome.com/docs/extensions/mv3/background_pages/)
Mozilla announced that the background page is deprecated and we need to migrate to service workers on manifest v3.
https://blog.mozilla.org/addons/2021/05/27/manifest-v3-update/
There are some information to migrate background page to service workers: