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由 piestealer 发表于 June 14, 2012 · 永久链接

One of the absolute best add-ons, in my opinion. Super simple, intuitive and useful. I often forget it's an add-on, and not just a FF feature, until I'm on someone else's computer, or using another browser to check a website's compatibility, etc.

Useful for everything from research to checking out the latest funny picture your friend posted on Facebook.