When you run it on a "who's hiring?" post, it creates a little search box in the bottom right of the screen. You can type any regex into the box (it's searched globally with the ignorecase option) and hit enter. It will then filter the elements on the page and tell you how many it matched. There's also a reset to get you back to where you were. Let me know what you think!You can make a bookmarklet by pasting the code from this link into the address section: https://gist.githubusercontent.com/dackerman/158e141dd2cc7cf643951b848c402ca0/raw/e4fa1c435c4dc4ab65e107faf59e469fe5e96d48/hn-job-search-bookmark.js
The unminified code is in a gist here: https://gist.github.com/dackerman/158e141dd2cc7cf643951b848c402ca0