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Verizon users have no longer have an excuse for using more than their alloted minutes on their voice plans while browsing the net. Thanks to this handy little extension, Verizon customers can now manage keep an eye on their account usage without needing to log into Verizon’s account page.

Rest assured that T-Mobile customers can get in on the Firefox action by checking out the T-Mobile usage extension.

Both extension provide a tooltip with pertinent information pertaining to the last statement date, peak / off-peak minute usage, “in-calls”, more recent calls, and misc info regarding text message usage.

The perfect extension for internet users who have failed to make use of their free minutes through Skype.