Since Firefox allows having multiple PIP-windows open, it would be nice to have an indicator-icon on the tab, in the PIP-window and taskbar. The idea itself: • On the left or right side of the tab, an icon that this tab is playing a video in PIP-mode. • If multiple PIP-videos are opened, this icon changes to a number, like [1] for the first PIP-video, [2] for the 2nd video, and so on. • Also, there should an icon be shown in the PIP-window itself, if multiple PIP-videos are open (like the number previously stated for the tabs). Maybe right next to the time if the video is paused or you mouseover the PIP-video. • And last but not least: If there are multiple PIP-videos open, the number-icon should also be visible in the taskbar itself. The biggest issue is to find a tab for muted videos, since you don't even have the audio-icon as wannabe-indicator. Sure, there is a back to the tab icon on the upper left window, but it would be a nice to heave feature to see, what PIP-video correspondents to what tab. Why: Imagine having a few YouTube-tabs opened. Now try to find the correct tab without closing and reopening the PIP-window. This should help, I think. Examples: Edit: Added some examples.
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