Chrome Proxy
This extension provides a toggle for your chrome proxy settings.
It's useful if you need to work with an intercepting proxy, or if you want to simulate taking your browser offline.
Since the proxy api for chrome extensions is still experimental, this extension can't be added to the webstore yet.
Installation
For user installation, the best way to install the extension is from the chrome web store. The web store will provide you with automatic updates, and won't require enabling non-webstore extensions.
Otherwise, create a local repository for the project, then navigate to chrome://extensions, and under the Development mode header, click 'Load unpacked extension...'. Navigate and choose the downloaded folder.
Options
The options page will let you configure the the value and scope for the toggle. For development of offline applications, it is often useful to only have your incognito windows be proxied, and it is also potentially useful to force the 'off' mode of the proxy to mean that you want to make direct connections, even if your network or system uses a proxy by default.