he has the files already, there is no need to download or re-rip. If he ripped them as ALAC (Apple Lossless) then he might want to convert them to FLAC though.
I didn't know about this controversy and checked Wikipedia[0]. Funny thing is, the first information is what it is called in German ("Prioritätsstreit"), indicating it's somewhat relevant in Germany and yet there is no German Wikipedia article about it.
There is a small segment in the german article about Leibniz[1] and even less in the German article about Newton[2].
For me Firefox stopped loading content mid-browsing. I thought it's some network issues and just did other stuff, a while later I realised every other app works. So I just restarted Firefox, and it worked.