XMLHttpRequest browser support on Chrome and Chrome Extensions

While using XMLHttpRequest method to access some data for a chrome extension i encountered trouble.
It is not possible to run XMLHttpRequest() from a chrome extension. Why? it turns out to be because of the
Same origin policy of the browsers in which in that, for security reasons, requests will only succeed if they are made to the same server that served the original web page. There are alternative ways to achieve this, but i don't know any of it

Java in Windows 8

Let's get this straight. Unlike previous versions of windows (98/Xp/Vista/7) windows 8 does not come with in built java, hence these machines are free from vulnerabilities that usually affect java. So a windows 8 user need not worry about it

In case you need to install java in your windows 8 machine you can download Java 7 from this link and install it using usual means. If you are installing java on your machine, please turn it off from your browsers so  that you will not affected by Oracle Java vulnerabilities