Another quote from Google:
1) Error: No Valid Storage Adaptors Found
This error occurs when the Twine engine cannot access the local storage (which is needs in order to store data). Common reasons it occurs include: Your browser's cookies are disabled. Privacy extensions and adblockers.
Regardless I'd try looking into the issue more on your end first, I just searched "firefox twine error no valid storage adapters found" and a whole list of links popped up. My only other suggestion is that you may have an older or incompatible browser for the twine engine, try looking at what twine needs to run.