If you're in the Style Editor dev tool, if you try to search for anything via Ctrl+F and hit Enter to submit the search, it closes the text box and goes to the first match (if one exists). If that wasn't the match you were looking for, you need to reopen the search and try again.
I'd prefer this search to work exactly how the search works in the Debugger tab. Honestly not sure how this is hasn't been done yet because this has been a completely unacceptable experience since these dev tools were created and in part caused me to switch to Chrome for most of a decade.
In addition, if you can implement something similar to Chrome's "Search" tool that searches through every file requested, that would be spectacular.