Be careful with old versions!
These versions are displayed for reference and testing purposes. You should always use the latest version of an add-on.
In addition, there is a new option: "Apply Cookie Settings to both HTTP and HTTPS". If this is set, the CM menu will not show the scheme and when a cookie setting is chosen via the CM menu, a permission for both HTTP and HTTPS will be set for the current site.
Moreover, I changed the keyboard shortcut to Control + Alt + M, from Control + Alt + C, as there were reported issues with Control + Alt + C.
Lastly, I made several other changes in response to a previous review from Mozilla, but kept the minimum version at 37.0a1. This minimum version change is really an educated guess based on a breaking change in version 37, so if someone can provide me with a more accurate minimum version that works with CM, please let me know.