Proxy Switcher and Manager by Richard Neomy

This extension provides a proxy settings UI very similar to Firefox's built-in proxy setting window but right from Firefox's toolbar panel.

The icon color changes based on your proxy setting to notify you about your proxy configuration (Read FAQs page for limitations of this WebExtension port).

The extension supports profiles. You can have up to 6 different profiles to manually configure all proxy settings.

For FAQs please visit:
http://add0n.com/proxy-switcher.html

For bug reports please visit:
https://github.com/rNeomy/proxy-switcher/issues

Available Options:
1. No Proxy
2. Auto-detect Proxy (not available in the WebExtension port)
3. System Proxy
4. Manual (http, ssl, ftp and socks 4 and socks 5)
5. Automatic (From a PAC url) (not available in the WebExtension port)

Available Tools:
1. External IP location detection
2. Geo location
3. IP leakage detection

Notes:
1. This WebExtension port is much more limited compared to the legacy alternative. There is nothing much I can do at the moment!