If the mimetype is set correctly you shouldn't have any problems with setting a breaking point.
Firebug throws the same error for both bootstrap and my js.
What I meaned was if you look under shared components > static files. In the detailed view.
What is the mime type of the mentioned files?
If it's not delete the current file and upload again.
You are absolutely correct. It is application/octet-stream.
I am using 4.0. I can assign the Application. And the Character Set. But I see nowhere to assign mime type after deleting and trying to upload.
However I saw another message here that referenced that IE caused the mime type to be application/octet-stream and that Firefox would work correctly. I uploaded in Firefox.
All is right with the world now!