In Firefox, type "% query" into the URL bar. That will search just open tab titles and URLs.
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).
I would also like a search function for browsing history. Most browsers let me search titles but I want to search content as in "show me the page I read 3 days ago with the words 'foo bar baz'".