browse() can't open data in browser

[kbroman]

Get the usual error

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at file:///tmp/RtmpXztLPD/qtl2_jurhfv/data/gwas.json. (Reason: CORS request not http).

[kbroman]

I seem to need an http server. If I go to the temporary directory that it creates and use node http-server and open the browser there, I can get it to work.