If a .mp4 file appears, right-click it and select to save it.
For a more automated experience, especially with encrypted or fragmented JWPlayer streams, dedicated extensions are the most reliable option. How To Download JW Player Videos using Mozilla Firefox
: Click the Media tab at the top of the window that appears.
: Scroll through the list of media assets. Look for entries where the Type column says "Video" or has an extension like .mp4 .
: Start the video so Firefox can detect the incoming data stream. Capture the Link :
: Highlight the video link and click Save As... to download the file directly to your computer. Method 2: Firefox Developer Tools (F12)
: Right-click on an empty area of the page (not directly on the video player itself) and select View Page Info .
If you see .m3u8 or .ts files, the video is a fragmented stream. You can copy the .m3u8 link and paste it into a media player like VLC Media Player under to "Convert" and save it. Method 3: Recommended Firefox Extensions