Quote:

Mozilla plans to introduce support for a picture in picture mode (PiP) in the organization's Firefox web browser in Firefox 68.

Picture in Picture mode takes video content on a side and displays it in its own window that acts independently from the browser's main window for the most part.

Designed specifically for users who want to watch videos while doing other things in the browser, it is a popular mechanism that is available in several Chromium-based browsers such as Google Chrome, Vivaldi, or Opera (called Video Pop Out) already.

Mozilla revealed that it is working on a Picture in Picture mode for Firefox in February 2019; the organization ran a Test Pilot experiment called Min Vid in 2016 which tested a similar but unrelated implementation.

Firefox 68: Picture in Picture Mode

Mozilla's implementation in Firefox is straightforward. Users need to hover with the mouse over the playing video on supported sites -- most HTML5 video sites should work -- to display the Picture in Picture icon.

A click on the icon opens the Picture in Picture interface and Firefox continues playback of the video in the new window.

The video content area in the main window displays "This video is playing in Picture-in-Picture mode". Firefox users may resize the Picture in Picture window, drag it around to position it on the screen, or use the play/pause or fullscreen buttons displayed in the window.

There is also a close button to terminate the Picture in Picture window; doing so restores the video in the main window automatically. The whole process is fluent and well designed.