I hope that Ausdroid have got it wrong about this, as I hate adverts with a passion.Google has confirmed that in a future release (and not distant future, we mean quite soon) the ability for ad-blocking extensions to do their thing will be removed.
The proposal–dubbed Manifest V3–will see a major transformation to Chrome extensions that includes a revamp of the permissions system. It will mean modern ad blockers such as uBlock Origin—which uses Chrome’s webRequest API to block ads before they’re downloaded–won’t work. This is because Manifest V3 sees Google halt the webRequest API’s ability to block a particular request before it’s loaded.
I have installed that Brave browser they recommend on the Chromebook, but it seems to be a work in progress as when you go to Bookmarks in the settings and look for the Bookmark Manager it is not there so I could not import my bookmarks into it.

https://ausdroid.net/2019/06/02/goo...t-a-great-time-to-switch-to-brave-or-firefox/