I found out back in '06 there was a Firefox plugin that did it. But it's not out there in the add-ons area anymore.
5 Answers
You could always cheat with Google:
There is a firefox add-on called search this site
I don't know if it's any good cause I never used it. I'm using a similar extension on chrome thought and it works flawlessly.
And you can always use google site feature just like John T suggested.
Are you talking about locating the search box on their site - it's usually at the top right of the screen (sometimes gets covered). If you are asking about searching on a search engine like Google, then yes, there is a way to restrict to specific sites - look under something like Advanced search options and there should be a place to put a site to restrict searches to. For Google it would be "what_you_are_searching_for site:sitetosearch" so "Batman site:lifehacker"
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I've attempted to find a search box on the homepage in 3 different browsers and it just ain't there. There's a "Share" box. But that's for adding content, not searching. Commented Dec 20, 2010 at 15:34
They removed the search feature recently because of security issues:
Due to the recent security issues, certain features of the site have been disabled. Among them? Search. But let's be honest: search didn't really work that well anyway. Here's a better way to search for your favorite posts.
Their recommended workarounds are to either use the Google site:
operator, or to add lifehacker to Chrome or Firefox.
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Wow. If that's the case, then they really need new programmers. Or they just need to educate the ones they have. Search is nearly as essential for a site like theirs as the content itself. Yeesh! Commented Dec 20, 2010 at 15:34
If you use Chrome or Opera, it is easy to build a custom (Lifehacker) search provider for those browsers so that you don't even have to use the site: operator every time you want to search something on Lifehacker.