For the lazy: Awesomebar is just firefox's the built-in address bar. It can be configured to search simultaneous through history, tab (titles of open tabs), etc.

Or one can specify what to search with this micro language:

    Add ^ to search for matches in your browsing history.
    Add * to search for matches in your bookmarks.
    Add + to search for matches in pages you've tagged.
    Add % to search for matches in your currently open tabs.
    Add ~ to search for matches in pages you've typed.
    Add # to search for matches in page titles.
    Add @ to search for matches in web addresses (URLs).
    Add $ to search for matches in suggestions.