Screensharing allows remote viewing one computer by another one. Typically, screensharing software is downloaded onto a both computers in order to initiate a session. Many screensharing services allow the ability to control the host computer. The fact that screensharing allows one person to see and control someone else's entire computer presents privacy issues that we try to solve.
Co-browsing is similar to screensharing except it's targeted specifically at websites. With cobrowsing, two people can browse the web together while on separate computers. Cobrowsing is typically used when people want to shop together, or for sessions involving more than two people.
With Firefly you can only see the web page that the customer is viewing. This provides a much more private, and secure browser-sharing experience than other screensharing providers.