uBlock Origin is a great open source adblocker.

uBlock Origin says they cannot perform well and as advertised in chromium based browsers. While, firefox is the best for their work.

Chromium is the open source version of Chrome which most browsers are based on.

"At browser launch, Firefox will wait for uBO to be up and ready before network requests are fired from already opened tab(s)." Not the case with Chromium-based browsers

"Chromium-based browsers give precedence to websites over user settings when it comes to decide whether pre-fetching is disabled or not."

"uBO on Firefox is the most efficient at blocking 3rd-party trackers relative to other other browser/blocker pairs"