Test errors in some browsers

* On IE <=8, the `supports` detect throws:

        Object expected

* On IE <=8, the `flash` detect throws (with no useful line num unfortunately):

        HTML Parsing Error: Unable to modify the parent container element before the child

* On Safari <=5.0, the `getrandomvalues` detect throws:

        TypeError: Result of expression 'window.crypto' [undefined] is not a valid argument for 'in'.