Is that Google Lens?

There is no shutter button. You move the finder over what you're looking for and the results update below as you move the finder. I have it over the RVT and it finds similar items below. See screenshots

Thanks for your reply. I assumed it was Google Lens—it's what happens when I tap the square icon to the right of the microphone icon in the browser or the FF search widget (with Google set as the search engine). I haven't been able to find much documentation about the feature, so maybe I'm guessing wrong about its function.

It doesn't seem to matter what I point the finder at—nothing happens.

Try it from Google Lens app. In the app you can then point to the same pics to get the same results I posted.

Thanks again. While I can use the Google Lens app (or the Google search bar at the bottom of my Pixel's home screen), I was just hoping to figure out how to get the function to work correctly in FF. I had hoped I could use the FF search widget instead of Google's. The microphone works fine; it's just the square-icon-that-looks-like-Google-lens that brings me to a dead end.