I just notice Firefox console outputs the following error for every single .js/.coffee file in my project (even the packages).
-file- is being assigned a //# sourceMappingURL, but already has one
Chrome's console doesn't show anything. I tried deleting all the .map files and clearing Firefox's cache but I'm still getting the errors.
It's a warning (not an error)
and it is a bug (https://bugzilla.mozilla.org/show_bug.cgi?id=1020846 fixed in FF 33)
This warning/error also applies to other libs (angular, backbone, etc.)