This allows you to rock jQuery on any page within Firebug even if that page has not loaded jQuery on its own.
- Install Firebug
- Install FireQuery
- Load up a page
- Open up Firebug and Console tab - press jQuerify - BAM!
- Enter awesome jQuery commands like $("div:contains('John')") to find all of the <div>s that contain the word John.
I love it!