I accidentally put a friend of mine off Wikipedia a few years ago by using Ctrl+F on it in front of her. She assumed it was a feature of the website, not of the browser, and thought it looked too complicated.

"You pick the search button from the menu on the top, just like copy and paste, right?"

No, that's a web search. To page search from there, you have to click the icon and choose search in page first.

In Firefox it's called "Find", not "Search". I think this is a better name because it distinguishes it from web searches, which most people will think of when you say "search".