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 //# sou
Update jquery - from the jQuery website http://www.jquery.com/download
You can also download a sourcemap file for use when debugging with a compressed file. The map file is not required for users to run jQuery, it just improves the developer's debugger experience. As of jQuery 1.11.0/2.1.0 the //# sourceMappingURL comment is not included in the compressed file.