imageo for firefox
This is firefox plugin to allow you to click on an image and then geocode it, if it has geocoding information embedded in it. To install it click here
To use it, when control-click over an image, you'll see a popup menu with a Geocode Image.
When you click that open, you'll either see a new google map tab open
Or you'll see a message that the image can't be geocoded -- you'll probably prefer the former.