Available only in a secure context?

[bicknellr]

Because this API relates to the ability to do work in the background, which is considered a privilege, functionality provided by this API is only available in a secure context.

I don't think this API itself should be limited to use in secure contexts. It would make more sense if you weren't in a secure context that the API exists but reports that there was no available budget for a particular action requiring a secure context.