Alter the DTA sourcecode available at [url removed, login to view]
to include an option to add the actual destination filename for the locally saved file to the .meta4 file output.
Example if saved file is c:/users/user/downloads/[url removed, login to view] then you would add [url removed, login to view] to the to the meta4 output.
The deliverable will be the source code bundle, Firefox Extension XPI, and source code deltas.
This does NOT need to support the Quantum version (57) of Firefox only the older version.