I have, for example, the next XPath query:
//div[span=\"something\"]/parent::div/child::div[@class=\\\"someClass\\\"]
I want to use this XP
As the co-author of Wicked Good XPath, I certainly recommend it for cross browser XPath support (on HTML documents, you can try using it with XML documents but the support is incomplete).
We welcome any sort of correctness test / performance benchmark on our library. During development, the library has been tested on IE 7 through 10 plus the Android 2.2 browser which doesn't have native XPath support.