Hello! Sorry for the change. It was made for mobile devices because those don't support opening a new pop-up window. If you like it in a new window, you can always detach the new tab that just opened by dragging it downwards and resizing it to your preference, then load the media and detect the list that way.

https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/windows/create#browser_compatibility

I could also put it on a floating menu, but then clicking anywhere would close it and cancel the download.

If you want to talk about this in more detail, open an issue on GitHub! (Code button at the bottom left, then "issues")