I agree it's too old !
I said I wouldn't support older browser, but hey, they keep sending me bug report on ie11....🙄
That's why I didn't dig too much on the question, I was just wondering if something similar had happened before.
I attached the screen cap in case you wanna take look.
As you can see, the first 3 are ok, then 5 or 6 are missing, then 5 are ok, then 8 are missing, then 5 ok, the 8 missing.
On the web site, you will have to wait for the introduction video, or press the skip bouton.
Then, the disk appear, and then the list of the artists name arrived.
That's where the problem is with FF 48.
Thanks for the help.