Usage of Firebase for Google Auth in Firefox extension

Question

I'm trying to use Firebase for Google Authentification in Mozilla Firefox extension. However, it throws this error: This operation is not supported in the environment this application is running on. "location.protocol" must be http, https or chrome-extension and web storage must be enabled.

After some researching i figured out:

1) Firefox extensions not supported by Firebase.

2) Adding of moz-extension:// doesn't work.

Here is some links to related questions:

• Firebase Auth with Firefox Web Extension Add On

• https://discourse.mozilla.org/t/moz-extension-protocol-is-not-accepted-by-firebase-any-workarounds/32570

Any workarounds at the moment? It has been one year since the problem was discovered... I need to use exactly Firebase for authentification, because it shares common DB.