Useful presentation on YouTube that adds some detail of the Felicity Ace story. Touches on the possibilities of fire source might be lithium batteries. If so, the difficulty of fighting the fire, saving the ship.
15 minutes.
What is Going on With Shipping? w/Sal Mercogliano
https://www.youtube.com/watch?v=JS4hC0B48G0
Car Carrier Felicity Ace, Volkswagens and Porsches on Fire in the Atlantic Ocean off the Azores