The Devil
Those are weatherstrip seals. The window regulator raises and lowers the glass.
thebax2006
Run channel. Usually it's a bad window regulator if the widow comes out of the run channels.
Jay P
'Window run channel' or 'window channel' for short.
L.N.
They are actually called window felts.
https://www.youtube.com/watch?v=jvn4bA9c0-Q