It is an easy to use add-on that I can do what I need. +5
(However, the graphics of the toggle button has one problem. Because it is a transparent icon used only black, it can not be seen under the system theme with a dark background. -1)

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Edit(2018-07-13):
> "svg.context-properties.content.enabled" to true in about:config
This method worked. Thank you. +1

The extension use its own settting independent with proxy settings in firefox preferences. The proxy setting in firefox preferences should be set to "direct" (no proxy) for this extension to work (at least on my FF59). This is not mentioned in the introduction or some where else. Anyway finally it works.

In the past there are addons whcih direcly toggle firefox proxy settings, e.g. QuickJava (http://quickjavaplugin.blogspot.fr/p/welcome.html). Now with the new FF57 extension system I don't koown where to find this kind of extensions.

Nice simple, does exactly what is promised.
Can you add a keyboard shortcut though?

Does exactly what promised and nothing more; the code is very short and easy to review.

It's unfortunate that you have to set up the proxy in the add-on settings, but that's a limitation of Firefox itself (the add-ons are no longer allowed to toggle the switch in the browser's settings, since Mozilla's move to WebExtensions).

the only thing missing is the exception; otherwise is perfect for my needs

很好很强大！感谢作者Richard！
Very simple but useful enough. That's just what I want.
Thanks to Richard.

Easy to use, thanks

This is what I want. simple and works.

Basic simplicity. THAT'S THE POINT! love it.

Этот аддон делает только то, что от него ожидаешь. Включает и отключает прокси по нажатию на иконку и ничего больше!!! Никаких левых функций!

very very useful，the firefox original proxy settings is too cumbersome

是我想要的。有办法支持快捷键切换吗？

Thank you, it simple and does what i need. And it works in ff57

Works perfectly for me with FF 57.0.2 64-bit! Allows me to switch between my defined proxy and none with a single click! Thanks!

It doesn't toggle browser's proxy but its own. No exceptions list.

This add-on works great with PIA proxy settings. It seems much faster than using the VPN Client and you can switch instantaneously. Thanks to the developer.

Simply works, super easy setup , one-button-on/off, and supports Socks5 authentication!! Woohoo :)

It would be a good idea to add option to enable/disable skipping proxy for local addresses. I would submit a patch for this, but there is no public repo.

when i set proxy in "network setting" of Firefox to "manually", this addon override it!
i expect this addon to be a shortcut of "network setting", just like old "elite proxy switcher" addon.

No effect on my browser (Firefox 57 on Ubuntu 16.04)

easy and effective