There are numerous firefox addons available that give you access to proxies , especially fast and secure proxy but anonymoX is fastest among all. Instead of inputing the proxy manually it itself enters the proxy for the user.
Unlike anonymoX , Quick Proxy allows users to enter the proxy manually(free public proxies can be found by doing google search). It is very easy to use and lightweight.
FoxyProxy is a Firefox extension which automatically switches an internet connection across one or more proxy servers based on URL patterns. It is one of the most widely used firefox addon for anonymous browsing. FoxyProxycompletely replaces Firefox’s limited proxying capabilities. It offers more features than other proxy addons.
4. Proxy Tool
It is a powerful, yet user-friendly proxy tool to manage user’s proxies and anonymity needs, including: 46M+ user agents (world’s largest), 10 different spoofed HTTP referrers, auto-proxy rotation, plus many more. It provides a feature to import more proxies on the tool.
5. Auto Proxy
With AutoProxy, you no longer need to switch your proxy status between on & off manually. If you prefer to visit a website via proxy, just add it’s domain to AutoProxy’s preference. After that, when you surfing, specified websites will be transfered through proxy while leaving others connect directly.