Chromebooks newest update has killed many ad-blockers. Including Ghostly and a few still in both Web Stores. Chromebooks use a different Web Store than Chrome for computers use.

Here are four that still work well on a Chromebook.
But they won't block those highly infested sites that uBlock can block.

https://www.geocities.ws/bkbrat/Blockers.png

As I said before.. Google is slowly pushing me 100% away from Chromebook, and onto Linux and the Firefox browser.