Arc-like automatic picture-in-picture in Chromium

There’s a lot to miss about Arc (RIP), but the feature I miss the most has got to be automatic picture-in-picture. You start a video and when you change tabs to jump to another task, the video anchored itself to the corner of your desktop. Go back to the video tab and it slurps up into the video player area. A perfect experience with no interruption. I switched back to Edge (for work) and missed Auto-PiP a lot. I tried building a custom browser extension to restore the functionality myself but hit a platform limitation with the mix of WebExtensions, PageVisibility , and MediaSession APIs you need to get it to work seamlessly. You had to configure each site in a dropdown and run a script each MediaSession… it asked a lot of the user. There’s been a handful of Chromium flags and experiments to add “Auto-PiP” over the years, but nothing did it as well as Arc did… until… about://flags#browser-initiated-automatic-picture-in-picture Chrome 142 introduced a new…