Review of StumbleUpon powered by the Slant community.
StumbleUpon is a discovery engine (a form of web search engine) that finds and recommends web content to its users. Its features allow users to discover and rate Web pages, photos and videos that are personalized to their tastes and interests using peer-sourcing and social-networking principles.
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Pros
Pro Single full-page content
Cons
Con Not possible to easily subscribe to all available interests
You have to follow interests manually by clicking on the checkboxes.