Auth0-spa-js must run on secure origin - issue in FireFox when using localhost

Help
1

Hi there, I’m encountering this secure origin issue in Firefox, both on macOS Catalina and windows. When loading our webapp from localhost:8080/
This is not an issue in chrome (mac + win) or safari (mac)

I have tested in Firefox version 100 and 101, the issue seems to be the same, I have also tried to access our webapp when it is hosted on a real domain, and here it is not an issue in any browser.

This is the error I am getting:

Unhandled rejection Error: 
      auth0-spa-js must run on a secure origin. See https://github.com/auth0/auth0-spa-js/blob/master/FAQ.md#why-do-i-get-auth0-spa-js-must-run-on-a-secure-origin for more information.
    
    e auth0-spa-js.production.esm.js:1
    e auth0-spa-js.production.esm.js:1
    Wc auth0-spa-js.production.esm.js:1
    c auth0-spa-js.production.esm.js:1
    c auth0-spa-js.production.esm.js:1
    o auth0-spa-js.production.esm.js:1
    o auth0-spa-js.production.esm.js:1
    Wc auth0-spa-js.production.esm.js:1
    initializeAuth0 App.js:159
    componentDidMount App.js:91
 http://localhost:8080/act/#/

Any idea what I can do about this? We’d like to run automated browser tests - also in Firefox, but we need to do that against a localhost, not our real live production app. We can’t do that as long as the auth0-spa-js wont allow us to do it on an unsecure origin in the combination that Firefox considers localhost unsecure.