After setting pref "dom.largeAllocation.testing.allHttpLoads" as true, I saw the following log from webConsole. (indexCanvas) A Large-Allocation header was ignored due to the presence of windows which have a reference to this browsing context through the frame hierarchy or window.opener.
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After setting pref "dom.largeAllocation.testing.allHttpLoads" as true, I saw the following log from webConsole when running Bingo Blitz. (indexCanvas) A Large-Allocation header was ignored due to the presence of windows which have a reference to this browsing context through the frame hierarchy or window.opener. I will update the test again with "dom.largeAllocation.testing.allHttpLoads = true".