Isso responde à sua pergunta.
Resumindo:
DownThemAll does not really store that information at all
- dta_queue.sqlite does contain the queue information. It is an sqlite database file.
- The queue table holds the actual information in the "item" column.
- The "item" column has various properties encoded as json.
- Within that json structure are the "fileName", "pathName" and "mask" fields along with other fields of interest.
- The actual path is computed as needed from these values. It is currently not cached anywhere on disk as there really is no need for caching. The code that computes the function is located in branches/1.1.x/chrome/content/dta/manager.js@#L1546.
Concedido, esse bugreport já é antigo, mas não acho que o DTA tenha mudado significativamente desde então.