Clipper+Firefox18.0.1解決法 Posted Today, 04:14 PM I was able to correct this issue. - Go to Firefox Add-ons / Extensions; Log out of Clearly. - Remove the Clearly and Clipper extensions from Firefox. - Clear cache and restart Firefox - Re-install Clearly and Clipper extensions -Log into Clearly with user name. Worked on OS10 Mountain Lion with Firefox 18.0.1