Flickr geotagging tools for Firefox come and go as the Google Maps API gets updated. The one that seems to have gained most in popularity since last I checked in is .CK’s Google Maps in Flickr, GMiF — now onto version 4.0, which incorporates the Google Maps API 2.0.
What I like especially about this most recent update is that it exists as a plain-vanilla Firefox extension — there is no more need to have the Greasemonkey script engine installed, and updating is much simpler. Once you’ve installed it, why not try it out on this picture? (Like with previous versions of GMiF, you can use it to fly to Google Earth from within Flickr.)