find.find () Searches for text in a tab. You can use this function to search normal HTTP (S) web pages. It searches a single tab: you can specify the ID of a particular tab to search, or it will search the active tab by default. It searches all frames in the tab. You can make the search case-sensitive and make it match whole words only. By default, the function just returns the number of ...
The find() method of Array instances returns the first element in the provided array that satisfies the provided testing function. If no values satisfy the testing function, undefined is returned.
Window: find () method - Web APIs | MDN - MDN Web Docs
The findIndex() method of Array instances returns the index of the first element in an array that satisfies the provided testing function. If no elements satisfy the testing function, -1 is returned.
The find() method of Iterator instances is similar to Array.prototype.find(): it returns the first element produced by the iterator that satisfies the provided testing function. If no values satisfy the testing function, undefined is returned.
The findLast() method of Array instances iterates the array in reverse order and returns the value of the first element that satisfies the provided testing function. If no elements satisfy the testing function, undefined is returned.
find Finds text in a web page, and highlights matches. To use this API you need to have the "find" permission.