uBlock Origin doesn't work on Facebook. I don't remember it ever working.
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[1] i.e. ALL of it. :)
Not sure how things are on Facebook, my point is that element picker is not a silver bullet.
We need a next generation of adblocker with computer vision that can look at the page and recognize banners visually
Did it, reload the page, and then watch all the ads still there, but some random div panel getting lost that you need.
Facebook did it intentionally. So that ad blockers don't work.