Unfortunately iCloud.com on FPR 32 with updated font blacklist is still not working.
Several fonts of the San Francisco package are still making troubles.
And at least the site requires WebGL - and I learnt by using the search function of this discussion page that can't be fixed.
However - thank you very much for your hard work. This topic can be closed now.
PS: I tried to use iCloud.com just to sync Apple Notes from my iPhone with my old Mac Mini G4, which seems to be impossible on Tiger. If someone of the community has an idea about a workaround it would be more than great :-)