> Service workers are disabled in private browsing mode because they are impossible to use without setting up state tied to the origin and URL scope. This inherently requires writing to disk.
> The tentative plan is indeed to use temporary disk storage that's encrypted so that in the event of a browser crash the data will remain unreadable. We're starting with IndexedDB support for this mode of operation and bug 1639542 is the meta-bug for that. This is a longer term effort.
> Service workers are disabled in private browsing mode because they are impossible to use without setting up state tied to the origin and URL scope. This inherently requires writing to disk.
Had no idea this wasn't permitted.