Firefox and Safari save the file with a funny names

[halloffame]

When I saved the YNAB data file from firefox, the named it saved it as was XzYTo3id.csv(1).part

Safari only lets you save the file with a .webarchive extension.

It should save with a .csv extension

[halloffame]

I just tested firefox 31.0 on Mac and it downloaded with the correct name.

Safari 7.0.6 downloads it with the filename Unknown with no extension.