[anonymouskimmer]

IGV is very nice for viewing sequence data. I've never loaded anything into it that wasn't already prepared to be loaded into it, but this is probably fairly easy to do. It's really nice for viewing three-frame translation to look at the proteins encoded by DNA, but for eukaryotes you have to pay attention to mRNA splicing even if you know the boundaries of the protein coding sequences.

https://igv.org/doc/desktop/#UserGuide/reference_genome/

Edit: Since you use Nebula's service, have you emailed them to ask what they recommend for genome viewing and analysis?