1. Right click option? Do you want a launch download links menu to be listed in the right click context menu?

2. Prompting for download location can be disabled through a setting in preferences. In download links pop Just click on the gear icon in the top right corner and you should be able to find the option.

Reply #2:

1. Got it. Will add that to backlog.

2. For security reasons Firefox doesn't allow addons to access any location other than the default download directory that is set Firefox Preferences. So let's say if you have saved a file previously in "C:\mydir" directory, then next time when you download through this plugin (or any similar plugin) it won't know that location.
Let's say your default download directory is C:\downloads, then this addon can create subdirectory relative to that and use that for downloading files. Subdirectory name can be by date, website name etc. This setup is through this addon Preferences (Gear icon)->Save Options (click on the ? in top for help)