Welcome to AF !
Thiers 1 cicuit breaker,
in the passenger side fuse box check that first.
(its probly ok since the passengerside works)
Then try cleaning the switch out with some compressed air.
Wiggling it back and forth sometimes helps too(temporarily).
The plugs connectors(copper colored parts)are also known to get corrosion on them,
from what I'd assume is when water leaks down the window into the buttons.
Can also test it with an ohmmeter, not sure which two prongs to test right off though.
Lastly they totally come apart, I'll post a pic.
Window button to the left you'll see that rubber piece, it covers the switches insides.
The tiny white squares are the actual triggers(buttons) for the window.
The button top that you use to push up & down, they pry off to the side .
They snap off/on , -[__]- this would be them upside down.
Those center lines are the area the pins snap into the switch housing.
Hope that makes cense !