---
title: "Importance of SSL certificate"
canonical: "https://servicedesk.maxgeo.com/space/LGL/1749188672/Importance%20of%20SSL%20certificate"
format: markdown
---
If a browser doesn't support service workers, a PWA (Progressive Web App) will still function as a regular website, but it won't be able to utilize features like offline access, push notifications, and background sync, which are all powered by service workers. The core functionality of the website will remain accessible, but the enhancements offered by the PWA framework will be unavailable.  


Why Service Workers are Essential for PWAs: 

- **Offline Functionality:**

Service workers cache website assets (HTML, CSS, JavaScript, images, etc.) so the PWA can load and function even when there's no internet connection.  

- **Push Notifications:**

Service workers enable websites to send push notifications to users, even when the website is not actively open.  

- **Background Synchronization:**

Service workers can handle tasks like uploading data or syncing information in the background, even if the user has navigated away from the PWA.  

- **Installation:**

Service workers are crucial for enabling the "Add to Home Screen" functionality, allowing users to install the PWA on their devices.  

**Browsers that Support Service Workers **

Modern browsers generally support service workers. This includes:  

Chrome, Edge, Firefox, Safari, Opera, Samsung Internet, and UC Browser (Android version). 

**Browsers that May Not Support Service Workers**

Internet Explorer (IE) and Opera Mini.  

**Impact of No Service Worker Support **

If a browser doesn't support service workers, the PWA will still load and function, but the following will be unavailable:  

- **Offline Functionality:** The PWA won't be able to load cached content offline.

- **Push Notifications:** The PWA won't be able to send or receive push notifications.

- **Background Synchronization:** The PWA won't be able to perform background synchronization tasks.

- **Installation:** The PWA won't be able to be installed on the user's device.

In essence, a PWA will degrade gracefully to a regular website if service workers are not supported.