Impossible to use Firebase React with Manifest v3

### Summary

It is not possible to use Firebase React in Chrome extension content scripts using manifest v3 because the CSP settings that Firebase requires to work are prohibited by Chrome's new CSP policies. Since it is no longer possible to publish new MV2 extensions, new extensions are unable to use Firebase in their documents (e.g. popup window).

### Original post

I have had the unique pleasure of trying to package a Firebase-enabled application as a Chrome extension, only to find that with manifest v3 the only way to do this is in a service worker, which comes with great limitations on how users can authorize with Firebase Auth and so on.

It is important that Google's own Chrome Extensions ecosystem is compatible with Google's own Firebase software, but I am not shocked to see the attempt to force developers to break their own apps before January 2022 when this team intends to deprecate manifest v2 even though this will preclude future extensions from integrating Google's own technology.

Peep the comments of this video for some examples of how distraught developers are about this issue, and plenty similar posts exist on StackOverflow as well:

https://www.youtube.com/watch?v=UjH2INUPmF4

What do?