GuifiProxy is a Firefox extension, a simple proxy manager for Firefox, enable you to switch between proxies. You can add the proxy list from a txt file or define it directly from the Options window.
It places an icon in the status bar that will enable you to select the proxy you wish to use.
GuifiProxy Features:
1. Change proxy with two clicks.
2. Import and export proxies lists using files.
3. Import proxies from URL.
4. Manually add, delete and edit proxies.
5. Automatic authentication on proxies (bypass popup with login and password).
6. Exception address where not to use proxies.
7. Configurations backup

Requirements:
* Firefox
* Thunderbird
* Firefox for Mobile

The license of this software is Free, you can free download and free use this browser plug-ins software.