Firefox shows security error after logging in
When I go to icloud.com using Firefox (41.0.1), it shows the green lock in the address bar. After I signed in and opened my mail, I noticed a triangle with an exclamation point, and when I click on the triangle, it says this connection is not secure. Before and after logging in, it shows an https: in the URL. When using Chrome, I am not having this issue with icloud showing an unsecure connection. When I log into other secure site with Firefox, I am not seeing the unsecure site error as I do with iCloud.
MacBook Pro, OS X Mavericks (10.9), 2.4GHz Core i7, 16GB 1333MHz DDR3