Firefox bug on LocalStorage (i.e. idp.storage.htmlLocalStorage=true)

[Cantor, Scott]

> If you have a trouble with Firefox 61.0/61.0.1 and with Shibboleth IdP
> configuration idp.storage.htmlLocalStorage=true, it may be caused by Firefox
> bug.
> 
> I found LocalStorage provides out of sync data (stale or empty) if:
> 1. multi processes (e10s) used
> and
> 2. cookie preference "Keep until: I close Firefox" is selected
> 
> This will cause SLO propagation failure and stateless clustering failure.

What kind of failure? I'm not seeing anything obvious (logout aside, I can't easily test that), but I don't really know what you mean by that first point. Multiple tabs? Overlapping login conversations? I'll see if I can trigger that.

> Additionally, it is also broken in private browsing windows of Firefox, so you
> should avoid it when you have any trouble with LocalStorage.

How does this show itself exactly?

Basically what am I looking for?

-- Scott