Frequently I’ll press Ctrl+h to quickly bring up the history. Prior to a recent update, this shortcut would immediately place a cursor in the search field so I could begin typing my query right away. Now I have to click the search icon before I can begin my search. It’s minor, but it’s amplified when a lot of searches are done.
Update (1/1/20): I’ve found you can quickly access the history search feature by pressing Ctrl+f after bringing up the history.