When comparing AdBlock Plus vs uBlock Origin, the Slant community recommends uBlock Origin for most people. In the question“What are the best Firefox add-ons?” uBlock Origin is ranked 1st while AdBlock Plus is ranked 25th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Free & open source
Pro Blocks a wide selection of annoying ads
Video ads on YouTube, Facebook ads, flashy banners, pop-ups, pop-unders and much more.
Pro Light weight
Pro Open source
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 Uses too much RAM
AdBlock+ tends to use a lot of memory, which has been documented in many use cases as well as admitted by AdBlock themselves. Considering there are alternatives out there that can block ads successfully with half the RAM usage as AdBlock, one has to wonder why this is a problem specific to AdBock.
Con Users automatically opted in to whitelist
AdBlock+ has an automatic whitelist when installed that allows certain advertisers through the blocking mechanism. The fact that these advertisers pay for this privilege makes this particular scenario rife with conflict of interest.