Hi mhugh, I think that message appears when Firefox has detected a new extension in a shared folder or in its startup scan of the Windows registry. If you haven't exited out of Firefox and started it back up again since installing Rapport, please try that first. Otherwise, you can check the Extensions list on the Add-ons page. This is where you can view, enable/disable, and often remove unwanted or unknown extensions on the Add-ons page. Either: * Ctrl+Shift+a (Mac: Command+Shift+a) * "3-bar" menu button (or Tools menu) > Add-ons * type or paste '''about:addons''' in the address bar and press Enter/Return In the left column of the Add-ons page, click Extensions. Then scan down the right side. Enabled extensions are listed first, A-Z, then the Disabled extensions. Can you find it there? If Rapport is nowhere to be found, perhaps you should reinstall it?