Engdocs 633 (#14534)

* Created new extensions user manual

_data/toc.yaml

@@ -1188,6 +1188,8 @@ manuals:
       title: Dashboard
     - path: /desktop/dev-environments/
       title: Dev Environments (Preview)
+    - path: /desktop/extensions/
+      title: Extensions (Preview)
     - path: /desktop/multi-arch/
       title: Multi-arch support
     - path: /desktop/kubernetes/

desktop/extensions.md

@@ -0,0 +1,77 @@
+---
+description: Extensions
+keywords: Docker Extensions, Docker Desktop, Linux, Mac, Windows
+title: Docker Extensions
+toc_min: 1
+toc_max: 2
+---
+
+Docker Extensions lets you use third-party tools within Docker Desktop to extend its functionality. There is no limit to the number of extensions you can install.
+
+Docker Community members and partners can use our [SDK](https://docker-desktop-extensions.netlify.app/){:target="_blank" rel="noopener" class="_"}  to create new extensions. 
+
+> **Preview**
+>
+> The Docker Extensions feature is currently offered as a Preview. We recommend that you do not use Extensions in production environments.
+
+![extenstions](images/extensions-image.PNG){:width="750px"}
+
+## Prerequisites
+
+Docker Extensions is available as part of Docker Desktop 4.8.0 or a later release. Download and install Docker Desktop 4.8.0 or later:
+
+* [Mac](mac/release-notes/index.md)
+* [Windows](windows/release-notes/index.md)
+* [Linux](linux/index.md)
+
+## Add an extension
+
+>**Note**
+>
+> For some extensions, a separate account needs to be created before use.
+
+To add Docker Extensions:
+
+1. Open Docker Desktop.
+2. From the Dashboard, select **Add Extensions** in the menu bar. 
+The Extensions Marketplace opens. 
+2. Browse the available extensions.
+3. Click **Install**.<br>
+From here, you can click **Open** to access the extension or install additional extensions. The extension also appears in the menu bar.
+
+## Enable or disable extensions available in the Marketplace
+
+ Docker Extensions are switched on by default. To change your settings:
+
+1. Navigate to  **Settings**, or **Preferences** if you're a Mac user.
+2. Select the **Extensions** tab.
+3. Next to **Enable Docker Extensions**, select or clear the checkbox to set your desired state.
+4. In the bottom-right corner, click **Apply & Restart**.
+
+## Enable or disable extensions not available in the Marketplace
+
+You can install Docker Extensions through the Marketplace or through the Extensions SDK tools. You can choose to only allow published extensions (that have been published in the Extensions Marketplace).
+
+1. Navigate to **Settings**, or **Preferences** if you're a Mac user.
+2. Select the **Extensions** tab.
+3. Next to **Allow only extensions distributed through the Docker Marketplace**, select or clear the checkbox to set your desired state.
+4. In the bottom-right corner, click **Apply & Restart**.
+
+## Update an extension
+You can update Docker Extensions outside of Docker Desktop releases. To update an extension to the latest version:
+
+1. Navigate to Docker Dashboard, and from the menu bar select the ellipsis to the right of **Extensions**.
+2. Click **Manage Extensions**.
+If an extension has a new version available, it displays an **Update** button.
+3. Click **Update**.
+
+## Uninstall an extension
+ You can uninstall an extension at any time. 
+ 
+ > **Note**  
+ >
+ > Any data used by the extension that is stored in a volume must be manually deleted. 
+
+1. From the menu bar, select the ellipsis to the right of **Extensions**.
+2. Click **Manage Extensions**. This displays a list of extensions you've installed.
+3. Click **Uninstall**.