Google Send to Phone is a web based service providing free service to send SMS (short text messages) to cell phones in the USA.
Google Send to Phone for Firefox is an extension that enables you to send short text messages (SMS) of web page content to your mobile phone. For example, you might text message yourself a phone number, an address, or directions that you find on the Web.
After installing the extension, select some text and click the cell phone icon Google SMS icon in the upper right hand corner of the browser. This will open a new window where you can send the text you just selected as a text message.
Fill in the number you wish to send the message to and select the appropriate carrier. Click the ‘Send Message’ button to send the message. You can send messages to US mobile phone numbers handled by these major carriers.