Facebook is a pretty high profile website, so it is unlikely that UBlock Origin won't block all adds there (I don't use Facebook myself, so I can't verify). In a normal desktop browser that is.
Of course.
Facebook is a serious cat & mouse with adblocking.
I once tried to look at an ad with the devtools inspector and the ad the disappeared. Somehow FB was detecting the inspector and remove the ad so it couldn't be inspected. (Well I'm sure that could be used against them)
https://github.com/gorhill/uBlock/
Facebook is a pretty high profile website, so it is unlikely that UBlock Origin won't block all adds there (I don't use Facebook myself, so I can't verify). In a normal desktop browser that is.