among the many things Firestone made, were radios, here is a 1952 vacuum tube AM radio manufactured by Firestone Tire and Rubber Co. Model 4-A-127

https://www.retroradiofarm.com/collections/frontpage

When referring to the other things that Firestone made, I was thinking of the time Firestone was licensing Plumb tools, and I'd forgotten finding a car radio once before at the swap meet

https://justacarguy.blogspot.com/2017/02/i-did-come-across-some-cool-things-at.html