How to clear a Service Worker cache in Firefox?

1. Open Developer Tools:

• Open the developer tools by clicking the menu button (typically represented by three horizontal lines in the top-right corner of the browser window), selecting "Web Developer", and then clicking "Toggle Tools", or by using the shortcut Ctrl + Shift + I (or Command + Option + I on macOS).

1. Navigate to the Service Workers tab:

• In the developer tools window, locate and click on the "Application" or "Storage" tab. Note that the exact name may vary depending on the Firefox version.

1. Locate the Service Worker:

• In the "Application" or "Storage" tab, find the "Service Workers" section. This section lists all active Service Workers for the current domain.

1. Unregister the Service Worker:

• You can view the status of each Service Worker, including its script URL and current state (active, waiting, or stopped). To remove the Service Worker, click the "Unregister" button. This action will unregister the Service Worker and clear its cache.

1. Clear Site Data:

• If you wish to completely clear all cache, including cache created by Service Workers, locate and click the "Clear site data" button in the developer tools. Clicking this button will clear all data, including cache, cookies, and IndexedDB.

1. Confirm Service Worker Removal:

• After unregistering the Service Worker, refresh the page or close and reopen the developer tools to verify the Service Worker has been fully removed.

These steps are intended for developers or advanced users managing Service Workers during website development or debugging. For regular users seeking to clear cache, navigate to "Preferences" > "Privacy & Security" > "Cookies and Site Data" > "Clear Data" to clear site data. However, this method is not specifically targeted at Service Workers.

For example, if you are developing a Progressive Web Application (PWA) and have recently updated the Service Worker script, you may need to follow the above steps to clear old Service Workers and cache to ensure the new script is installed and activated. This guarantees the application loads the latest files and operates as expected.