Firefox add-on for sending SMS

Developed an addition, while for myself, but maybe someone will need:
addons.mozilla.org/en-US/firefox/addon/14555

Allows you to send messages to your phone via the web gates of cellular companies.

I will provide support through Google code:
code.google.com/p/sendsms-ff
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I would welcome any comments additions. If you need new operators, write which ones and how you can contact you for testing.