Test cases

#63040 Chrome fires initial popstate, fixed on Chrome 34
Webkit fires initial popstate while injected script, fixed on Chrome 35
#371549 Chrome repeatedly repeated same hash URL history/popstate by onclick on same URL (hangs on error page and recreates XMLHttpRequest)
#428916 Firefox doesn't retry new XMLHttpRequest but instead returns cache
#264412 innerText standardized and landed in Firefox 45