{
    "featured_versions": ["68.5a1", "68.6b", "68.5.0"]
}

{
    "featured_versions": ["68.6b", "68.6.0"]
}

Update Fennec versions for 68.6 release
Update Fennec versions for 68.6 release

Drop nightly version as users were migrated to Fenix.  Beta is kept at 68.6b for now as 68.7b hasn't shipped (and might never ship).