On desktop, I use FireFox's picture-in-picture (PiP) feature frequently when watching videos. I also frequently use the AI chatbots. I think it would be nice to slap a button in there that would put the chatbot in a re-sizable pop-up window, similarly to the PiP.
I've also been utilizing the feature that allows me to have tabs on the side of the screen -- instead of up top -- and the division of the screen between the tabs sidebar, the AI chatbot, and the Web site browser window is fairly cluttered.
Merry Christmas!