Rated 5 out of 5 stars
OptimizeGoogle is a more updated version from this add-on -- last updated (from this review) 12/1/09 with the same appearance and features but with many additions.
If you do decide to switch to optimizegoogle -- you'll need to uninstall this one and also make sure to write down all your settings because I noticed that once I switched to that one, many of the boxes I had checked on this one weren't checked on that one.
Now if this add-on is updated past that add-on then I'll switch back to this one and so on. It does appear that the max vs has been updated on this one so there may still be hope for this add-on yet so I still give it 5 stars.