Two problems with 360 videos

[digibud]

The first problem is related to Firefox on Mac OS. After posting an injected 360 file to YouTube it take on a strange color shift that only appears on Firefox. FF community support has not responded. The other issue is a hard break at the stitching line that is only observed in exported MP4's. After exporting from Insta360studio the hard stitch line occurs. Insta360 exports in a 16:9 ratio, not 2:1. Would that be the cause? Attached is an example of the color shift and the hard break at the stitch line.