The last version of Firefox 71.0 has the mode picture-in-picture στην αναπαραγωγή video. It is only available on Windows and is expected to come to Mac and Linux versions next month.
Mozilla's new function, the "picture within a picture" as it is rendered in Greek by company, places a video in the lower right corner of your screen. The video can be playing and you can simultaneously surf or do any other task with the rest of the screen.
Video in Picture-in-Picture mode comes in front of each window and prevents other tabs or windows from hiding it.
Once you have downloaded the latest version of Firefox, hover over a video that is playing or paused and the blue will appear choice “Picture-in-Picture” (Picture-in-Picture). Click the button and the video will open in a window, but you can move it according to your needs. The feature is only available in the Windows version, but it will come, according to Mozilla, in January and Mac and Linux versions.