When comparing StopAd 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 StopAd is ranked 22nd.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Multiplatform
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)>
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 Doesn't block ads on YouTube and Facebook on mobile devices
Doesn't block ads on YouTube and Facebook on Android and iOS.