Firefox: Service Worker: SecurityError: DOMException: The Operation is insecure

In app.js, I am checking the serviceWorker existence in navigator object and if available then registering the SW.

if ('serviceWorker' in navigator) {
    navigator.serviceWorker.register('./service-worker.js', { scope: './' })
        .then(function(registration) {
            console.log("Service Worker Registered!");
        }).catch(function(err) {
            console.log("Service Worker not registered!", err);

When trying to register SW, I receive the below error in Firefox. I also made sure the service-worker.js file is under src directory.

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Checking my about:config in Firefox (version 59.0.2) I had service worker and storage api enabled. So that shouldn't be an issue.

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PS: The same code works fine on Chrome.



Did you check the cookie setting in about:preferences#privacy, it must be 'keep until they expire', if you have 'keep until I close firefox' selected sw will not register.

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you can find details on this thread:


You can keep "Delete cookies and site data when Firefox is closed" checked, as long as you create an exception for your site. (Tested in Firefox 78.0.2)

Click on "Manage Permissions..." and enter a url (e.g. localhost:8000). Click "allow", then click "Save Changes" in the bottom right corner. Service workers (and cookies etc.) should now work for this url, but not for other urls.

Developers, note that "localhost" is not the same as e.g. "localhost:8000" (you need to specify the port number).


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