Anonymization Toolbar - This extension allows you to surf the web anonymously and allows you to delete the time any sensitive information that has, such as cache or history.
BrowseAtWork - The BrowseAtWork as the name suggests is ideal for those with certain sites is blocked at work in the library and others. With this extension can page or links within pages anonymously through a link that is integrated into the context menu (menu that is sampled when clicking the right-click a link).
FoxyProxy - FoxyProxy is currently one of the best solutions for online privacy is completely customizable and changes proxy whenever necessary, according to the rules imposed by the user. Worth!
FoxTor - This extension gives you a total control configuration. Allows you to browse the Web anonymously using the encrypted TOR network. This extension ensures you a level of privacy far greater than many other services of anonymity.
ProxySel - This extension allows you to choose a proxy to connect via a drop-down menu at the top of the browser, also this extension also allows the user to import lists of proxies from some sites such as proxy-list or checkedproxylists to surf the proxies therein.
SwitchProxy Tool - The SwitchProxy gives the user the power to switch the proxy settings while browsing the web.
Tor-Proxy.NET Toolbar - Get Safety and Anonymity by using TOR-Proxy.NET for surfing! Tor-Proxy.NET is a CGI-Web-Proxy, which tunnels your traffic through different anonymization-networks. That way you get high anonymity.