Dec 08

To add SIP URI protocol handling to Firefox 3.5 and later, do the following:

1) Launch Firefox
2) Type about:config in the address bar and press ‘Enter’
3) Accept the warning
4) Right click somewhere on the page and select New –> Boolean from the menu
5) Set the name to “network.protocol-handler.expose.sip” without the quotes
6) Set the value to “false”
7) Close the about:config window (or tab)

Navigate to a page that has a SIP URI that you would like to call and click the link. When prompted, select your favorite SIP client as the application to launch. Your client should launch and connect to the URI. That’s it!

Note: SIP URIs that are embedded in webpages are in the form “”

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