The SourceMap spec mentions that X-SourceMap was deprecated, we should support the expected header:
> The HTTP header should supply the source map URL reference as:
> SourceMap: <url>
> Note: previous revisions of this document recommended a header name of “X-SourceMap”. This is now deprecated; “SourceMap” is now expected.
Created attachment 198914 [details]
[PATCH] Proposed Fix