Verizon Minutes Used Firefox Extension Version 0.96
The new version now works with the latest verizon web site. I also eliminated the error pop-up when login failed thanks to suggestion from Mike.
You can download the new version here .
(for those interested, the change I made to fix the problem is to add the referer field to the login request. Apparently Verizon started to check that field on their side. )
note: it's discovered that this version doesn't work with firefox 2.0. i am still investigating a solution...