Rated 5 out of 5 stars

although the policy management tab is a little buggy in firefox 3.6.17 (deleting and editing of permissions almost impossible) the extension controle de scripts seems to be quite useful. i will use it to further improve my privacy and security.

for example, if you are worried about browser fingerprinting (test it at https://panopticlick.eff.org) you can turn off certain information leaks while javascript in general keeps working. for example, i successfully prevented the broadcasting of my screen resolution by adding the permission rule "Window.screen" and setting the status to "Block". This also works to prevent the disclosure of installed plugins by adding "Navigator.plugins" and much more...

i recommend to use controle de scripts together with the famous addon noscript which allows to manage javascript permissions on a website-based level.