> ## Documentation Index
> Fetch the complete documentation index at: https://tbd-6fc993ce-hypeship-scraperly-link.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Extensions

Manage browser extensions for use with Kernel browsers.

## Extension Management

### `kernel extensions list`

List all extensions in your organization.

**Output includes:**

* Extension ID
* Name (if assigned)
* Created date
* Size in bytes
* Last used date

**Example:**

```bash theme={null}
kernel extensions list
```

### `kernel extensions upload <directory>`

Upload an unpacked browser extension directory or zip file.

| Flag            | Description                                                                      |
| --------------- | -------------------------------------------------------------------------------- |
| `--name <name>` | Optional unique name for the extension. Must be unique within your organization. |

**Example:**

```bash theme={null}
# Upload with auto-generated ID
kernel extensions upload ./my-extension

# Upload with custom name
kernel extensions upload ./my-extension --name my-custom-extension
```

<Info>
  Extensions requiring enterprise policies must include `update.xml` and `.crx` files. See [Extensions requiring enterprise policies](/browsers/extensions#uploading-extensions-requiring-enterprise-policies) for details.
</Info>

### `kernel extensions download <id-or-name>`

Download an extension archive by ID or name.

| Flag          | Description                              |
| ------------- | ---------------------------------------- |
| `--to <path>` | Output path for the downloaded zip file. |

**Example:**

```bash theme={null}
# Download to current directory
kernel extensions download my-extension

# Download to specific path
kernel extensions download my-extension --to ./downloads/extension.zip
```

### `kernel extensions delete <id-or-name>`

Delete an extension by ID or name.

| Flag          | Description               |
| ------------- | ------------------------- |
| `--yes`, `-y` | Skip confirmation prompt. |

**Example:**

```bash theme={null}
# Delete with confirmation
kernel extensions delete my-extension

# Delete without confirmation
kernel extensions delete my-extension --yes
```

### `kernel extensions download-web-store <url>`

Download and unpack an extension directly from the Chrome Web Store.

| Flag              | Description                                             |
| ----------------- | ------------------------------------------------------- |
| `--to <path>`     | Output directory for the unpacked extension.            |
| `--os <platform>` | Target OS: `mac`, `win`, or `linux` (default: `linux`). |

**Example:**

```bash theme={null}
kernel extensions download-web-store \
  https://chromewebstore.google.com/detail/extension-id \
  --to ./my-extension
```

After downloading, you can upload the extension to Kernel:

```bash theme={null}
kernel extensions upload ./my-extension --name my-extension
```

### `kernel extensions build-web-bot-auth`

Build Cloudflare's [Web Bot Auth](/browsers/bot-detection/web-bot-auth) browser extension for signing HTTP requests with RFC 9421 signatures.

| Flag              | Description                                                                          |
| ----------------- | ------------------------------------------------------------------------------------ |
| `--to <dir>`      | Output directory for the built extension (required).                                 |
| `--key <path>`    | Path to JWK file with Ed25519 signing key (defaults to RFC9421 test key).            |
| `--upload <name>` | Upload the extension to Kernel with specified name (e.g., --upload my-web-bot-auth). |

**Examples:**

```bash theme={null}
# Build with default test key
kernel extensions build-web-bot-auth --to ./web-bot-auth-ext

# Build with custom key
kernel extensions build-web-bot-auth --to ./web-bot-auth-ext --key ./my-key.jwk

# Build with custom name and upload
kernel extensions build-web-bot-auth --to ./web-bot-auth-ext --upload my-web-bot-auth
```

<Info>
  This command requires Node.js and npm to be installed on your system.
</Info>