i purely wana block some sites and i wana know how
Answers:
I'm using Firefox, but I'm not aware of such extra, however, I downloaded Parents-Friend which is a free, small program that runs masked:
http://www.parents-friend.de/index1.htm...
For firefox i suggest you move about to the addon subdivision and find something here.
There is profusely of special programs for that. Look for Norton Internet Secuiry, it should include Parental Control, or some other software than Symantec. Google "software parental control" !
Use the hosts report. Search for "Block Sites Hosts" for instructions on how to do so.
In internet explorer, click on the tools tab at the top and select internet option on the menu. When the glass comes up, click the content tab at the top. The first risk is "content advisor" you can turn it on and configure you're settings near.