This is probably not the right component. I encourage people to move it to the right one. nsExpirationTracker's Iterator doesn't work properly, as it doesn't reset its index when it changes generations. This simple patch fixes that.
Created attachment 332676 [details] [diff] [review] initialize the index when iterating over generations
Pushed to mozilla-central: https://hg.mozilla.org/mozilla-central/index.cgi/rev/f2a2c672d4cf Although for the record, I would have liked to at least give MOA for this patch, since I am technically the module owner.