You get prompted to supply your location just like normal.

Using geolocation on the web is not something I do daily, but I do use it every now and then. The "locate stores near me" button for looking up store closing times is a lot easier than manually panning across a map.

I find Chrome's current implementation (on Android) to be acceptable as long as measures are taken to prevent clickjacking and such to automate repeating prompts after denying permissions. I expect other browsers like Firefox to be more conservative in showing popups like that.