Important Note: This extension will NOT help you access videos from sites like YouTube or Netflix.
This extension intercepts visited web page's network requests and identifies all m3u8 video stream URLs. When a m3u8 URL request is found, it is displayed in a box that overlays the visited page (see image above). Also, you can open the extension's popup window to view and open the first and last m3u8 URLs found for each site.
For example, I use this extension mostly to identify video streams from live TV news streaming pages, and if they use m3u8 files for the stream, I can take that URL and open it separately in another browser window or with other video playing/recording programs like VLC, Kodi, or Jaksta Media Recorder.
Please visit the extension's companion web site for complete details if interested at: http://sigmafxdx.com/m3u8Sniffer