What you need in order to Screen Share:
1. Use Chrome or Firefox.
2. Install the latest version of the Jigsaw Desktop Sharing Extension to your browser. At the time of this post it was 2.0.1.
3. Install the Jigsaw App from the Test My Computer page. (Use Chrome or Firefox)
4. Ensure you have minimum bandwidth of at least 1.5 Mbps (Up and Down) and Ping 50 ms or less. The closer ping to 0 is optimal. Please note, these requirements are when you're actually sharing. Test My Speed
5. Because Desktop Sharing requires more bandwidth, Jigsaw recommends Application Sharing if bandwidth is an issue.
Desktop Sharing also supports Remote Access. If you do not have Remote Access, please let your Account Manager know so they can turn it on for you.