If you see a message saying "Extensions Disabled," it's because Mustang has turned off one or more of your extensions to keep your data safe while you're browsing the Internet.
The extensions that Mustang turned off either didn't come from the Chrome Web Store or were installed without your permission.
To protect you while you browse, Mustang only lets you use extensions that have been published on the Chrome Web Store.
Extensions that have not been published on the Chrome Web Store are grayed out and you won't be able to turn them back on.
If you need to use a disabled extension, you can contact the extension’s developer and ask them to upload their extension to the Chrome Web Store. This will allow you, and other people who use Mustang, to install that extension from the Chrome Web Store, or if you already have it installed, to manually re-enable it from your list of extensions.