Picture in picture was a feature I didn't know I wanted all along.

I often had a window open only playing a youtube video, having it be native to the browser and always on top is such a great feature.

Open in new window. Resize window. Right-click title bar, select "Always on Top".

App developers spend a lot of their time making up for the poor decisions of OS developers. A good window manager would give you tabs for free, PiP (aka an always-on-top window) for free, dark mode for free. Instead OS devs go overboard in simplifying things to the point that app devs have to pay the cost of delivering what users want.

Take YouTube for example. It's difficult to resize the window so it's _just_ the video (they size things so you always see the video + title).

With a proper PiP mode, that's no longer an issue.

Win10 (the version I have at work) has removed "keep above" and made it application specific, OneNote has it, Word doesn't. It's crazy.

Windows has never had a universal "keep above" menu option.

> app developers spend a lot of their time making up for the poor decisions of OS developers

On the other hand, Firefox keeps the close button for tabs on the right, even in macOS where every close button is on the left.

Thankfully, I've found a bit of userChrome that corrects this, as a workaround.

That's actually the issue. Most operating systems don't have the windowing capabilities of most Linux distributions.

I'm stuck on a Mac, where I cannot always on top, hide the title bar, or alt-drag windows to move them.

macOS also has it's own PiP mode, which is nicer than what Chrome has. I wonder if FF is using their own implementation as well.

It's a custom implementation, sadly :(

All it needs now is some way to force Twitter-based videos to not mute when the parent window's not in focus.

Agreed. I use it all the time. There is an issue where the video in the pop-up can be slightly "laggy" for some reason, not sure why that is. Otherwise great feature.