The "Reset Safari" in Firefox!
If you are following me on Twitter, you'll know that I am switching to Firefox as my primary browser and will keep using Safari as a secondary browser. One feature in particular that I really liked in Safari is "Reset Safari", because it doesn't reset everything, it lets me uncheck things that I don't want to reset. A similar feature is present in Firefox. It is in the Preferences, in the Privacy tab. The feature is "Clear Now..." for the Private Data. Just like Safari, it will let you choose what you want to reset.