When comparing AdBlocker Ultimate vs StopAd, the Slant community recommends AdBlocker Ultimate for most people. In the question“What are the best ad blockers?” AdBlocker Ultimate is ranked 10th while StopAd is ranked 18th.
Ranked in these QuestionsQuestion Ranking
Pro Avoids awful looping problems on Firefox one sees with Adblock Plus and uBlock
Pro Completely free
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.
Available for Windows, Mac, Android and iOS.
Pro Blocks ads on YouTube and Facebook on Windows and Mac
Blocks ads in social media websites including YouTube and Facebook.
Pro Works on all browsers without multiple downloads
As it's not an extension - it works on all browsers (Chrome, Opera, Safari, Firefox, IE etc)>
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 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.
Like any browser extension it slows down your browser.
Con Doesn't block ads on YouTube and Facebook on mobile devices
Doesn't block ads on YouTube and Facebook on Android and iOS.