Seems kinda like picture in picture, but for regular sites. I watched the video and can't understand why you'd highlight a section of text, move it to a mini window that can just be moved around and lose the stuff you said you'd wanted in the window. Maybe that's part of the beta. Doesn't seem like a lightweight version of what you wanted to keep pinned but I can see some utility in it if it's improved.

This is really cool though! Other tools using that feature are the builtin screenshot tool and SingleFile, where you can only select a specific area.

Oh that's what that is! How do I disable it permanently?

I'm typing this comment from a mini window. Actually works a lot better than I was expecting. Being able to resize is a nice touch

Might be good to use on a multitasking context, I could give it a try.

Anybody know if there are nested tree tabs yet or do I still need sidebery? The biggest thing left for me is how sidebery opens links as child tabs

Neat

I can't think of an immediate use case, but like picture-in-picture video, it will likely be useful at some point