MediaSniffer Plus од Null Digital

MediaSniffer Plus Firefox addon simplifies tracking playlist and subtitle URLs used in Apple HLS, Adobe HDS, MPEG-DASH, and Microsoft Smooth Streaming. It enables direct video/audio file downloads and monitoring of custom file extensions and Content-Type headers.

Additional options:

Rapidly copy URLs via filename clicks in the addon's popup menu.
Customize preferences through the options page for direct media file downloads.