Quote:Mozilla plans to integrate a picture in picture mode in the organization's Firefox web browser to play videos in a separate always-on-top frame on the desktop.

Picture in Picture mode offers two main advantages over watching videos on the webpage they are embedded on: the picture in picture frame is distraction free and acts completely independent.

It may be easier in some situations to use the viewing mode to watch a video in a small window on the desktop. While it is certainly possible to achieve the same using "full" browser windows, e.g. by positioning them accordingly, or by using third-party players, it may often be easier to use picture-in-picture for that.

Google integrated a picture-in-picture mode in the company's Chrome browser in 2018, and several other Chromium-based browsers, such as Vivaldi, support the functionality as well.

Mozilla implemented picture in picture mode functionality in Firefox Nightly already (but partially at this point). Firefox users who run the cutting edge development version of Firefox may use it play videos that are embedded on sites in a smaller window; this looks like the following:

Full reading: https://www.ghacks.net/2019/02/18/mozilla-working-on-firefox-picture-in-picture-mode/