Nothing lower than a thief who breaks more than one window getting in.
the front is easy, pull the door panel(braking all the dried plastic clips
), roll the window down partway, and there are 2 screws or 10MM s that hold the window bracket to the track.
The back one is more of a pain. Pull the door panel, roll the window down, take stuff apart till you can lean the pillar forward and wiggle the assembled small window and rubber into position. At least that is how I remember it, but it's been quite some time....