Page A either redirects to B or not.
In Fx5, if A redirects to B at least once, it gets permanently excluded from
"most visited"
that's obviously not correct behavior.
In Fx6, there's been a change but it doesn't seem correct either:
If A doesn't redirect to B at least once, all prior redirected visits to B
start counting towards A and it appears in the "most visited" ahead of B.
What should happen: for the purposes of the query, A's visit count should
include only those visits when A did not redirect to B
Bug 678712 - visit count incorrectly determined for redirectsMode=2 queries
https://bugzilla.mozilla.org/show_bug.cgi?id=678712