I have to do searches for my downloads at times, Seedcorn.
The computer just puts them where you last decided something should go. Fortunately, Firefox at least asks me what I want to name them. Then, I'd better go looking for them right away while I still remember that name if I didn't check where they were going.
You might think that computer would be smart enuf to put downloads in "Downloads!" But no! I have inadvertently downloaded pictures even to "Music!" Sheesh!
Steve