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Apparently not configured to work for any US ISP's as I don't see any listed on the set-up options menu and doesn't appear to work with AT&T. If that is the case it should be mentioned in the "long description" to save from wasting time downloading and installing

Это отзыв для предыдущей версии этого дополнения (1.1.0.23). 

If your ISP isn't after "The currently compatible ISPs are :", it's isn't compatible. ;-)
However, you can go to http://extensions.geckozone.org/Minimeter-en#askmodules to see how to ask for a new module.