When comparing Ghostery 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 Ghostery is ranked 28th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Blocks many ads
As a side-effect of stopping trackers, Ghostery also disables many annoying advertisements, and with less of a performance hit than the various AdBlocks (especially when using both).
Pro Prevents you from getting tracked
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 Sells user data
Helps advertisers by selling user data. Though this can be turned off.