main frame - has 1 onunload handler(s)
main frame - has 1 onunload handler(s)
main frame - has 1 onunload handler(s)
main frame - has 1 onunload handler(s)
main frame - has 1 onunload handler(s)

FAIL history.forward() with session history assert_array_equals: Pages opened during history navigation property 2, expected 2 but got 3