Please add the option to skip the file if it is already downloaded. Also, I don't see the ability to set where to download files. I'm glad you're working on the add-on again. It's great news :-)
I don't know if I have a bug or not, tried all betas since beta 2, but when I try to click to download a file, I don't get a DTA download dialog box like it used before with old firefox versions. Can DTA capture or not download links?!
This is a feature that DownThemAll! cannot implement as it is not possible in WebExtensions. https://github.com/downthemall/downthemall/issues/18 Nothing we can do about it; mozilla would have to add something that allows WebExtensions to integrate in the Save As window like that.
