When comparing AdBlocker Ultimate vs uBlock Origin, the Slant community recommends uBlock Origin for most people. In the question“What are the best ad blockers?” uBlock Origin is ranked 1st while AdBlocker Ultimate is ranked 6th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Completely free
Pro Best Youtube ad blocking
Pro Free and open source
Anyone can improve and audit the code.
Licensed with a gplv3 license.
Pro Supports most popular browsers
AdBlocker Ultimate works on Chrome, Mozilla Firefox, Opera, Internet Explorer, Safari and Yandex.Browser.
Pro No acceptable ads
Unlike other adblockers, AdBlocker Ultimate doesn't have any whitelisted websites, ad networks or advertising agencies.
Pro Avoids awful looping problems on Firefox one sees with Adblock Plus and uBlock
Pro Open source
Pro Light weight
Pro Promised to remain commercial interest free
uBlock will remain free from any commercial as stated by the creator. uBlock is meant to be strictly for the users and completely free.
Pro Lots of advanced features
For example, you can add more items to your HOST files like disable social tracking.
Pro Thoughtful UI
Its non-invasive design shows you how many times something's been blocked on a given web page – that number quickly jumps to the double- if not triple-digits in some cases.
Pro Can be used on Firefox Mobile
Pro Detects skimming
Skimming means replacing links so that they are rerouted, this is mostly a more friendly way to make money than showing ads.
Pro Edge version
Also available for Microsoft Edge browser.
Cons
Con Just a browser addon
It is just a browser addon so it will only work with the supported browsers and you have to install it for all browsers separately.
Con Element hiding helper has occasional hiccups.
Con Memory hog that gets worse the longer it runs
Happened with 64-Bit Firefox 62.0.3 running on Desktop PC with 64-Bit Windows 10 Pro with 8GB of RAM.
Con Slow
Like any browser extension it slows down your browser.