In most modern browsers you can't capture this when find-in-page box has focus. Only if you manually select text after searching can you capture it (or, like th

In most modern browsers you can't capture this when find-in-page box has focus. Only if you manually select text after searching can you capture it (or, like the other reply stated: capture the scroll distance). But you could easily disable ctrl+f and throw up your own search box with keypress capture. Not all browsers show the search box outside of the browser viewport, and even for those that do (such as Chrome), you could display a hovering modal inside the viewport, as most users won't remember the exact location of the search box.