When you say you want to search like Spotlight from the keyboard, what do you want to search that it doesn't already? Just press WinKey/Meta/Super and start typ

When you say you want to search like Spotlight from the keyboard, what do you want to search that it doesn't already? Just press WinKey/Meta/Super and start typing when the overlay comes up. I added a calculator extension in there, as well as one to search Firefox bookmarks, and it's pretty much got me covered.