In the nightly builds of Firefox, which will form the release of Firefox 130 on September 3, an experimental feature has been added for automatically continuing video playback in a floating window (picture-in-picture mode) when switching from the tab displaying the video. In other words, if you switch to another tab while watching a video, the video will remain visible over the new tab, thanks to the automatic activation of picture-in-picture mode. When you return to the original tab with the video, the picture-in-picture mode automatically deactivates. The automatic activation of picture-in-picture mode can be enabled in the settings under the 'Firefox Labs' section.
Source: opennet.ru
