Recently, Auto PiP for tab switching was delivered in the latest stable and nightly release. But I feel like auto PiP could be expanded to open PiP when users switch applications. Because just like with the current auto PiP, users won't have to manually open PiP before they switch applications. However, some users might not want PiP to open when switching tabs or applications. So maybe make an option to disable auto PiP for those who don't want it.