uMatrix is a cool extension for FireFox, Chrome, and Opera that lets you control specifically what requests are made on webpages. By default, all 1st party cookies, scripts, plugins, and XHR requests are all allowed; all 3rd party CSS and images are allowed too. Everything else is blocked. There are also ad-provider blacklists that block all requests made to known ad providers and tracking services.

Click here for the source codes

Download links

• Firefox Addon
• Chrome store
• Opera store

Screenshots