Browser compatible?

[csmartj]

Hello, I launched a jbrowse, using test data volvox, access the url API:
http://myurl?config=test_data/volvox/config.json&session=spec-{"views":[{"type":"SpreadsheetView", "uri":"test_data/volvox/volvox.filtered.vcf.gz","assembly":"volvox"}]}
In Firefox, it works fine, but in Google Chrome and edge, it shows an error:
Error: HTTP 206 fetching test_data/volvox/volvox.filtered.vcf.gz
Is it a bug?