Firefox same tabs pinned in every window

I’d like to have the same pinned tabs in all my windows (similar to Safari). So when I open a new window, the set of pinned tabs in the old window will automatically appear in the new one.

It’s easy to make the same set of tabs appear in every new window by setting them as home pages, but I’d like them to be pinned as well, so they don’t take up so much space, and I’d like for this to happen automatically.