Added
- Right-click picture-in-picture to tuck it into your default spot, and again
to bring it back out. Right-clicking the tuck button still picks a spot. - A full peek at tucked picture-in-picture (off by default): pointing at the
strip shows the whole video, clear and with its controls, until the pointer
leaves the window, rather than nudging it out a little. From
PiP Tuck Away by Apostol
Apostolov. - A playing video goes picture-in-picture as you leave its tab (off by
default): Firefox's own setting for it, in Zia's.