Net Download Manager Browser Integration by Kerollos Magdy

Net Download Manager Browser Integration connects Firefox with the free, open-source Net Download Manager app for Windows.

What it adds:
- a "Download this video" button on every video, also inside embedded players
- a quality menu with the real qualities and file sizes (Best, 4K ... 144p, audio only)
- a Playlist button on YouTube playlists and channels, and on other supported sites
- "Download this audio" on music sites such as SoundCloud and Bandcamp
- "Download all links with NDM" in the right-click menu, grouped by file type
- browser downloads are passed to the app for faster multi-part downloading

The add-on needs the Net Download Manager app installed on the same PC:
https://github.com/PhKero/net-download-manager/releases

Privacy: the add-on collects no data. Links are only sent to the app running on your own computer (localhost).

Source code: https://github.com/PhKero/net-download-manager-extension