diff with a working version from Source Maps 101, the problem is just resulting of one character difference. With newly updated UglifyJS v2.3.6, SourceMapping pragma has changed to //#:
but my Chrome browser lags behind. It recognizes source maps as
I did not use the latest or dev build, the current Chrome browser I am using is yet to support
//#. What I really need is Chrome Canary. Unfortunately, it is not available for Linux :(.