Mozilla Firefox will provide users with the picture-in-picture function that is already under test.

Mozilla has begun testing a new feature of the Firefox browser that allows users to continue watching videos in other windows or desktops. Officially called the picture-in-picture mode, the new feature has been tested in the Firefox Nightly version to improve it before it is released to the public.

­at present, Firefox browser competitors already offer picture-in-picture mode, such as Google Chrome, which supported picture-in-picture last year. With this feature, users can watch YouTube videos on other windows and allow users to configure parameters such as the size of the pop-up window. Currently, Firefox browsers can't do this because the existing picture-in-picture feature only launches a pop-up window that runs on top of other windows, and that's almost all of it. It works fine on YouTube, and you can call this option by right-clicking to play the video. The current picture-in-picture feature doesn't even have the option to turn off picture-in-picture video, so you must right-click it again to turn off the picture-in-picture feature.

­like Google Chrome, Vivaldi also provides picture-in-picture mode, which you can turn on by right-clicking on the YouTube video. The pop-up window displays the pause button and the close button when the mouse hovers. When the video is played in picture-in-picture mode, the YouTube main tab displays the message "this video is playing in picture-in-picture mode". It remains to be seen when the picture-in-picture feature will be available to Firefox browser users, but it is clear that Mozilla still needs to do a lot of improvement.