Decoherent

Well, I'll toss a vote in :) I hadn't realized that Proton Drive had developed into basically a drop-in replacement for OneDrive, except, of course, for privacy. It'd be neat!

Relevant to [#2152](https://github.com/mozilla/multi-account-containers/issues/2152). Also, hello from the future. This behavior has caused me tremendous difficulty on occasion, like letting my "very personal" container getting accessed by my "Google-box" container. A...