SJCallSJCall
SJCall is a beta version of a VoIP extension enabling you to place telephone calls directly from the Mozilla applications using SJphone, the world-leading Internet softphone.
Just select a text you want to use to place the call, right-click the selection, and click Call... on the pop-up menu. Or, right-click the respondent's address and click Call... on the pop-up menu, or click the Call button on the respondent's Card.
NOTE: Before using this extension, make sure SJphone is installed on your system and you have an appropriate ITSP account.