There was a time browser worked for you. Opera up to 12.xx offered a panel letting you configure what JS can/cant do. It even let you configure global/per domain storage quotas and forbid websites from dumping megabytes of garbage on harddrive (Im talking to you ad network trackers/wikipedia). You can check out all of the sweet customization Opera 12.xx provided:

http://help.opera.com/operaconfig/versions/Win32/11.50/en/in...