If you download files from Seedr, you should always use a download manager. Browsers are not optimized for large downloads. They cannot properly resume interrupted downloads, and often incorrectly report broken downloads as finished.
A download manager will effortlessly and accurately resume your downloads whenever needed. It will also open multiple connections to better utilise your bandwidth. We recommend FDM.
To have up to 8 concurrent connections for downloads, and best utilise them, you will need to upgrade to a paid plan.