Glad to see this addon working again in Firefox Quantum. It doesn't work exactly like it did before Firefox Quantum for example DTA being integrated into the default download window. Besides that, it does work like it should. If you want to download a file you'll need to either right click a download button and select the DTA options or click the DTA extension in the download page and select the right link. The only problem I have with this addon is if you are downloading multiple files, it can really slow down your computer and lag your internet connection. So be aware of that. But as long as you don't do that, you'll be fine.