This page demonstrates how you can use native find functionality to expand a details element, but content hidden within divs will not be expanded. Search for foo. It lists 3 occurances but can only highlight 2; one is inside a <details> Element and another is inside a 0 height div with a toggle class on the parent element.

Content in details element

Default expansion

Lorem ipsum dolor sit amet consectetur adipisicing elit. Nisi mollitia velit aperiam, officia repellat ab ex iste neque facere minus ipsum, perspiciatis excepturi! Ut veniam officia, perferendis iste sint fugiat? foo

Content in details element

Content in divs