OS Windows XP 64bit not fully detected

[deerwood]

On your test page my XP 64 is only detected as "Windows", not as "Windows XP". The essential string in the UserAgent is Windows NT 5.2 (note the 5.2). Would you consider to add this OS to your plugin?
Here the UserAgent strings from my 4 browsers:

Opera   - Opera/9.80 (Windows NT 5.2; WOW64) Presto/2.12.388 Version/12.17
Chrome  - Mozilla/5.0 (Windows NT 5.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.99 Safari/537.36
FireFox - Mozilla/5.0 (Windows NT 5.2; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0
IE8     - Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; WOW64; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET CLR 1.1.4322; .NET4.0C; .NET4.0E)

Thanks