Comment 29 for bug 643899

(In reply to Richard Newman [:rnewman] from comment #4)
> I think the code as written will grab intl.properties instead of actually reading
> the real value.

It will indeed, but that's not necessarily a problem if it sets the pref the same way (setComplexValue(..., nsISupportsString)), as long as that URI resolves to something that exists and contains a value for that pref in both Firefoxes. It's hard to think of cases where that wouldn't hold, but that probably explains why this isn't affecting most Sync users.