For some days now I have been getting a lot of 403 when fetching the Firebase logged in users image (in the web browser, Chrome, from the onAuthStateChanged callback.) I have also now and then seen 403 when fetching images directly from "googleusercontent.com".

This is when I run the code from the Firebase emulator. (I seldom look at the live site at the moment.)

The problems seems to be intermittent. Does anyone know if there is any problem at Google that could be the cause?