There are 2 things that I would like to suggest.
1. Add a pause, play and stop button for a download. also it would be helpful if you can show if a file is still downloading or already downloaded.
2. Show file size.
Reason to suggest:- I started a download of a file(did not know the size of it) but then I realized that the file I downloaded was wrong. I tried searching for an option to stop it but could not find. I was in a meeting and did not bother if it took couple of mb's from my data. But then after the end of my meeting I check, the file size is 4.5GB in my 'Downloads' folder, and it was still downloading, I again tried to search for an option to stop it but failed to, I ultimately killed the app from my task manager.