I just stumbled across a cool feature in Firefox that I suspect has been there for a long time. But since I've never heard of it, I figure maybe there are other people unawares like myself.

In Firefox, you can search in a page by doing a Control + F (or from the menu bar, Edit -> Find in This Page...) and typing your text. But there's a way to search the page that is even faster. Go to Preferences and select the Advanced preferences, and the General tab. On there is a checkbox option called "Search for text when I start typing". If you check this box, you can search by just typing on the keyboard. As soon as you start typing, it automatically opens the search bar for finding in the page.