Proxy Toggle от Ben

This extension uses the existing proxy settings in Firefox. It simply adds a toggle button to the toolbar.

The Firefox proxy settings are in:
[Options > General > Network Settings > Configure Proxy Access to the Internet].

To change the proxy configuration or the default on/off state:

1. Disable the extension.
2. Change the Firefox proxy settings.
3. Re-enable the extension.

The proxy will be in the default state (that you set via the steps above) when you start Firefox.

The add-on must be allowed in Private Windows to work (FF 67+).

Advanced note:
The extension resets the proxy setting on startup. If there are no other extensions modifying it, the setting will revert to the user-set value. To learn more about how Firefox manages setting changes, see Firefox BrowserSetting (MDN).