If you're interested in seeing it getting implemented, you can check out Mike Conley's YouTube channel. He regularly streams Firefox development and he's the main force behind PiP in Firefox. I believe the first episode where it's mentioned is #165 [0] but it spans over many of them.

[0] https://www.youtube.com/watch?v=2_5zwg9Ucoc

Here’s a Mozilla blog post from Mike Conley and Emanuela Damiani about implementing PiP in Firefox:

https://hacks.mozilla.org/2020/01/how-we-built-picture-in-pi...

It is a little clunky and could use a good deal of polish. For example, you can only PiP one video, and controls remain in the tab with the video frame. PiP only gives you play/pause, no scrubbing or anything from the embedded player. The always on top is a feature for some, but can be a hindrance, too. That behavior should be a toggle for the user so they can use their tools how they like.

These are a few of the reasons I've continued to use the "Open With" extension with mpv. ([right-click]->Open With->mpv) This provides full playback control, lets me toggle stay-on-top, etc. Firefox's PiP is a nice thought but just isn't right for me as currently implemented.

Sorry, which extension is this? The only one I was able to find named "Open With" is pretty clearly not what you were referring to.

I prefer this one as it is potentially more secure than some of the other ones

https://github.com/grmat/play-with

This is the one I currently use: https://github.com/darktrojan/openwith Perhaps play-with is a better choice.

MPV is a player. https://mpv.io/

Oh, I know all about MPV. Invoking it cleanly from within Firefox is the part I was asking about (and which has been answered :)

That's what I do as well, and it's fantastic. Bonus functionality: Get MPV to always open on the second screen fullscreen (if you have one) and have it be always-on-top, small and on the bottom right corner when non-fullscreen, so you can just press Esc on the full-screen mpv window and get a PiP-like window.

samesame

also;

* rank up the cache settings in mpv to prebuffer the whole vid

* see the ytdl-format setting in mpv.conf to select a codec that your machine can decode in hardware for enhanced power efficiancy (lower fanspeed)

if you like vim like keybindings courtesy of tridactyl

bind V hint -W ! mpv to show a letter or letters adjacent to all links and open the one chosen in mpv. Normally most pages have few enough links visible that hints are either 1 or 2 characters. This means instead of picking up the mouse you can hit 3 keys.

You can get most pages down to 1 character if you craft your own custom selector, e.g. https://github.com/tridactyl/tridactyl/blob/dc8919e7e65d5dfa...

For the record we don't recommend piping straight to `!` as a malicious (and fairly Tridactyl specific) site could use it to execute whatever it wanted. We have a default bind for open in mpv that sanitises things - https://github.com/tridactyl/tridactyl/blob/dc8919e7e65d5dfa... using https://github.com/tridactyl/tridactyl/blob/dc8919e7e65d5dfa...

Thanks. A question occurs to me shouldn't such sanitation be its own step in order to be generalized to anything that the user wants to run?

if it's not always on top, why break it out of the browser window at all? maybe i just haven't used it enough for your request to become apparent to me, but it seems counter intuitive on first thought.

I really like Firefox PIP, but it's not perfect yet. I have missed the "timeline" so it would be easy to jump back if I wanted to re-watch the last bit. But I have noticed now that if the PIP window is active the arrow keys works for that which is great and it's also possible change volume with up/down arrow. So what a most miss now is that the PIP window remember its size and position from last time. Right now (on youtube) different resolutions gives different window sizes.

I wish I could get subtitle support on Netflix. Their app doesn't allow you to resize when its as always on top. PiP allows me to position it where and how I want, but lacks subtitles :(

IIRC there was a firefox extention that popped out anything into a browser window with a simple header. You'd have a quarter inch of header, but it would be like a poor mans PiP and you'd end up with more controls at your disposal than the native firefox solution.

It works better than the native support on OSX. A lot of videos I watch on Safari don't show the PIP button but work fine on Firefox.

In Safari, you can right-click the speaker icon in the tab or address bar, and there's a PIP option in the menu.

Not as accessible as Firefox for sure.

Well, that's exceptionally well hidden. Thank you for the tip.

Good to know, thanks. I suspect right click doesn't work when there's a transparent div over the video.

Luckily this is all in the browser's UI, nothing a webpage can do to block that.

The actual pip window in firefox is not native and as such 1) doesn't support spaces that well 2) does not support minimizing 3) looks worse

A long time ago, I wrote the PIP feature for browsers on the very first version of Android based Smart TVs (Phillips TVs). It used Mozilla's Gecko NPAPI plugin ( their version of WebKit) and built on top of Opera, the only one at the time that would support funnelling broadcast TV data at the time. It was pretty challenging, but still way more easier than trying to build with Safari, chrome. I always wondered why this feature never really became mainstream until now.

Same. It's great.