ctrl + L to go to the address bar then type * <space> to search in your bookmarks. Replace * with ^ to search in your history or % to search in your open tabs

ctrl + L to go to the address bar then type * <space> to search in your bookmarks. Replace * with ^ to search in your history or % to search in your open tabs. You can also try @google or @wikipedia to search on those websites. I love those shortcuts! This is the kind of features that make Firefox far superior to Chrome in my opinion.